Chapter 9: Sans Becomes A Pet

"Oh no you don't." She told Sans ignoring his flaming red eye and pinning him to his bed. "You want to act like you're still in charge of Papyrus you're going to have to see that you're wrong."

"Oh yeah?! Let me the hell up!" Sans growled trying to get up which only resulted in his hands being trapped in Frisk's belt. "Damn it Frisk!"

Then Frisk smirked and nibbled his neck. She was purposely making him mad that she was ignoring him because then his reaction time was slower. Which is just what she needed the angrier Sans got the more she could put on things he needed. Sans was about to yell at her again when he felt something on his neck which was reinforced with the click he heard and the movement of leather.

"What the hell is that?! Frisk!" Frisk smirked and clipped something onto it before releasing his hands, He touched his neck to find a studded spiked collar around it. "The Hell! I'm not a fucking dog!"

Frisk chuckled as having never even dealt with a collar before he didn't know how to remove it and started fighting to pull it off his skull. Frisk chuckled once more, grabbed the leash that was attached to the collar and yanked on it firmly.

"Gah!" Sans yelped as his neck and skull were forcibly pulled closer.

"Oh yes you are. My little pet. And I have many games planned." Frisk smirked at his angry glare. "But first it seems you need to be taught a lesson. A pet calls their owner, Master."

"That's not gonna happen." Sans grumbled looking away fighting to act like he didn't care for this.

"Oh isn't it?" Frisk asked and before Sans could figure out what she was doing found himself in a kiss her hands teasing and snaking their way to his pelvis bone.

"Cheater!" Sans grunted out and threw his head back. "N-Not fair!"

Frisk smirked and continued to rub and tease his pelvis over and over ignoring his grunts and groans about how embarrassing this was. "You say that, pet, but look at you. Already summoning my favorite tool."

"You caused that you little shit! And you know it too!" Sans retorted a bright red blush on his face. "I haven't done the victim role since I was a teen!"

Frisk stilled her hands making him pant and look at her nervously. "It's not a victim." She told him honestly running her hand down his skull slowly but lovingly. "You're my pet for this evening."

"I've never done it." Sans mentioned to her before she kissed him and he leaned into it. "I don't know if I can."

"You have a safeword don't you?" Frisk asked and Sans blushed. "Your brother and you used to do this-"

"That was fucking different and you know it!" Sans growled at her before she leaned more into him pinning him to the bed gently with her body. "We only did that because we needed to feel like someone gave a shit about us!"

"I know Sans." Frisk whispered and this time he strained himself to hear it. "I also know that I want to try some of the things you wrote in your journal."

"Hey that was private!" Sans growled back groaning when Frisk set to nibbling his jaw seductively.

"I know. But it clued me in on your safeword." Frisk looked him back in the eye sockets. "Now please. Humor me. If you really don't like it, say your safeword and I'll back off."

Sans felt his soul glow brighter. It was true things were very different with Frisk. She never once let him feel trapped even when he was. He always felt like he had an out. And unlike when his brother and he would do this, it was always rushed, quick. Felt like he always had to HAVE an out or death could happen. For her it was entirely different. He wanted so much to just tell her thank you, tell her how amazing it felt to have many outs and the choice to continue or not. But he was afraid if he opened his mouth he might beg like a bitch. The last thing he wanted to do was look weak even in her eyes.

"Frisk…" It was all he trusted himself to say.

Years and years of having to be strong didn't fade easily. It was going to be a fight and strangely it felt ok to fight her on it. Ok to really tap into his brain and rewire it over time. It was ok. But it would take time, time that she seemed willing to give.

"Just once." He closed his eye sockets at that. "Just once." She repeated softly. "It can be a whisper. Really. I just want to hear it once." He shook softly until she ran a soft gentle hand over his skull. "One time then I will remove the collar and everything will stop. We will work up to this."

"M-Master." He mumbled softly and as promised she kissed him and raised herself a little off of him unclipping the leash then reaching for the collar only to have Sans wrap his boney hands over her own. "Don't… It's…" He cleared his would be throat. "It's ok."

Frisk smiled at him and kissed him placing her hands alongside his skull and he stilled for a moment before he raised his own over her back to cling to her shoulders and kiss her back as much as he could. When Frisk was panting and looking at him he smiled before giving a soft sigh and grabbing the leash handing it back to her.

"Sans. I-" Frisk started but stopped when Sans put a boney finger to her lips.

"If you're doing it... I think I'll be ok." Frisk smiled at him still unsure.

"You sure? I don't want you to think I'm forcing you." She told him blinking when he grabbed her arm with the hand holding the leash and pulled it towards the collar.

"I'm sure." He kissed her once she did and smiled. "IF you tell me what you and Boss really did today?"

"What do you mean?" Frisk asked confused.

"For being at the pet store getting THIS." He gestured to the collar and leash. "You certainly didn't hear your phone for hours."

"Huh?" Frisk pulled out her phone from her pocket and swiped over to the bouncing notification center. 20 missed calls. It told her like a middle finger. "Oh. I'm sorry."

"I was worried. And I may have snapped because of it." Sans told her honestly wrapping a boney hand in her hair. "I don't want anything to happen to you two."

Frisk smiled back placing a hand on her flat belly which Sans placed his other one on. "I… We went to Alphys. To tell everyone what they could expect in the next nine months. The length of time for my pregnancy… well usually."

"So you didn't bring me because?" Sans asked yanking on her hair to bring her towards the collar.

"I didn't want you to get mad or try to chase them off. They are a part of this family too. Also… I was a tad annoyed that you were still treating Papyrus like he was your kid." Frisk replied before falling silent and clipping on the leash to Sans' collar.

"And?" Sans urged gently.

It was nice to be able to talk to someone instead of wonder how your actions were being taken. It was one of many things that he loved about Frisk.

"What if you still treated him like a kid when we have ours? Would they wonder if their daddy loved them as much as his brother?" Frisk fought back the tears as best she could. "Would they feel cheated on like I am starting to? I mean. He's an adult. He can make his own mistakes and choices now and it feels like-"

Frisk gasped when she felt Sans wipe one of the tears she hadn't realised she'd been crying away. "Frisk. Honey, I'm sorry." Sans felt his heartstrings pulled on when she nuzzled her head into his boney hands. "I know he's an adult. I know he can make his own mistakes but I'm scared. I'm used to being his world. His everything. Now what am I if he has Mettaton? I'm nothing."

"That's not true Sans." Frisk replied quickly pulling him into a hug. "You're his brother. No matter what happens you will always have a place in his heart. Always."

Sans looked at her and smiled. He knew she was true but having someone tell you that when believing it was hard. Made it all worth it. He gave her a gentle squeeze and then felt a tug on his neck glancing over at her. Frisk held up a hand which the leash was wrapped around and pulled it closer to her bringing him closer as well.

"You little tease." Sans growled and flipped her over before a hand on his ribcage stopped him.

"Remember. You're my pet tonight." Frisk smirked at him. "You do what I want."

Sans smiled at her and then nodded yes. "As you wish. What do you want me to do… Master?" He whispered the word Master and they both knew eventually he would be ok with it too.

"I want you to bite me." Sans was stunned and his face showed it. "You heard me. I want you to bite me and mark me as yours."

Sans blinked as she got closer to him almost like in a hug and he shook his reservations out and gently nibbled the space between her neck and shoulder. He didn't want to break the skin but with Frisk's encouragement, did and let out the more animal side of him. Frisk yelped softly when Sans pulled back and forming a tongue with his magic began to lick the wound. It stung a bit but he was being gentle and she was grateful for it. Once he got started Sans just kept going only stopping when his jaw was snapped shut by a pull upwards on the leash.

Sans smiled as Frisk kissed him and he let his tongue play with her own. When she pulled back he had to admit the collar somehow made this more sexy than it normally would have been. He looked over her panting and shaking body and couldn't help but laugh. If this was her plan with a collar what else was she planning in that dirty mind of hers? He had a feeling he would find out quickly. Those thoughts left when he felt another tug on the collar.

"Alright. That's enough playing around puppy. Get off." Sans blinked but did as he was told reluctantly. "Here's the deal. I choose the position, you do as I say. Got it?"

"Yes." Sans mumbled quickly.

The yank on the collar and flip on his back Frisk pinning him to the ground, let him know that this wasn't just nice play anymore. "Yes what?"

"Yes Master." He got out quickly not wanting to incur the wrath of Frisk having never seen it before.

"That's better." Frisk replied. "Seems we have a lot of training to do puppy."

"I'm not a puppy." Sans mumbled with a glare at the door.

"What was that?" Frisk growled back and instantly Sans stood at attention.

"Nothing!"

"Hmm… That's what I figured puppy."

"Bitch. Gah!" Sans yelped quickly catching himself before his skull smacked the ground, the yank on the collar an obvious correction.

"If you won't accept the gentle corrects I'll just have to get firmer with you puppy. Let me make this clear. YOU will be the bitch tonight that I might graciously allow you to fuck me if you do as I say. If not, I will get off and you will not be allowed to. Understand?"

The look in Sans' eye sockets really conveyed he understood what the collar did and meant when on him. "Yes… Master."

"Good." Frisk replied before looking over Sans' body making him blush.

He moved to try and cover it, the intense stare making even the great Sans nervous. His tug on the collar got the message across though. Don't cover yourself in front of me. Sans moved his arms away keeping his gaze down and the firm yank on the collar forced his eye sockets to look into Frisk's.

"It's embarrassing." He mumbled softly but otherwise remained still.

"To bad puppy." Frisk replied though she did give his skull a gentle caress. "Now. On you knees."

Sans quickly sat up on his knees not wanting another yank. His jaw still stung a bit from the previous one. He didn't want a repeat experience. Shaking inwardly and wanting to just leap onto Frisk and take her himself he could only watch as she released the leash for only a moment and began to slowly and teasingly remove her shirt. The black bra showed off her curves and made Sans fight to stay on the bed. He hadn't been told to stay but the order was in Frisk's eyes.

Frisk turned her head away for two second to hide her smile and it proved to be the undoing of her control for the moment. Sans teleported from the bed to behind her pulling her close to him and squeezing her breasts through her bra. Though this was what the leash was for. Frisk responded just as quickly and grabbed the leash yanking down and to the right sending the stunned Sans to the floor.

"Ooof!" He grunted once he landed the yank had caused him to lose some air, not enough to be winded, but not enough he wasn't in need of catching it.

"Haa." Frisk finally let out her groan of pleasure that she had bit back to correct Sans. "Nice try puppy. I was going to be nice to you, but it seems that's just too good for you." She started walking over to the bed the leash still held and forcing Sans to be dragged towards it at well. "If you don't play nice then neither will I." She tied the leash to the bed and leaving her top half completely bare since Sans had managed to take off her bra in his lunge for her, she grabbed some soft furry handcuffs and then used them to handcuff Sans to the bed as well before she pulled out her phone and called someone. "Yes. It seems that our plan will have to start a little earlier than anticipated. Is it ok with you two if I steal you?"

"Frisk don't you fucking dare!" Sans growled trying to lunge for her only to be stopped by the collar and handcuffs making him wince slightly. "Damn it! Frisk!"

"Give me a minute." Frisk told the person on the phone before turning to Sans' desk and pulling out one of his secret tools. A riding crop. "Do you want to try that again? Puppy?!" Frisk emphasized the word puppy pointing the crop towards Sans who shut up and let his skull fall a bit forward. "Good. Forgive me, my pet is still learning his place."

Sans knew his eye was flaring in rage but should he try to teleport what he was wearing or attached to would move with him and he didn't have enough magic to teleport his bed. He waited until Frisk hung up then looked up seeing her text someone. She had been doing a lot of texting lately but he didn't know to who. She would simply say, "Don't worry about it." and leave it at that. Suddenly the door to his room had a knock on it and Frisk walked over to open it.

"Are you insane?!" Sans snapped. "Not while I fucking look like this bitch!"

Frisk turned to face him after opening the door a crack and walking over to him, before using the riding crop on his hip bone, causing Sans to yelp and groan in slight pain, and slight pleasure. "You will address me properly. And you will not question your Master's plans."

Sans glared up at her until he saw who was entering the room as the door squeaked open then closed. His eye sockets widened. "B-b-Bro!"

"As you can see I've tried training him, but he has yet to truly listen." Frisk replied and Sans hated how his brother could now see her without her shirt on. "One trainer to another, do you know of any way to help him learn?"

"Oh I know quite a few ways." Papyrus responded an almost eerie grin on his skull. "But knowing how hard headed this one is… We might need a third opinion. Luckily the great and terrible Papyrus has a plan and has already issued the ask for help. Until then. We can start correcting him for yelling at you when I came in."

"Sounds good to me." Frisk smiled and pulled up one of Sans' chairs to sit on.

"B-Bro! Please!" Sans tried to tell Papyrus off but as soon as he opened his mouth found it stuffed.

"You know what I want boy." Papyrus smirked while he demanded his older brother. "Don't disappoint."

Sans gave a soft whine before obeying and proceeding to suck off Papyrus. Frisk smiled and then stood and placed a hand on Papyrus' shoulder which caused even Sans to look at her. After all Papyrus had stilled when she had touched him which made him curious. He was even more confused when Papyrus pulled back out of him after Frisk whispered something he couldn't hear to him. Papyrus never did that and it caused Sans to cough a bit as he could finally breathe again.

He looked back at Frisk as a knock on the front door occured and Papyrus left to open it. As he watched Frisk it was clear she had said something to Papyrus meaning that they all knew she was in charge, which made Sans' fear dissipate like steam. He wasn't at the revenge of an angry or sexually frustrated Papyrus, this was planned by the one person he trusted more than anyone in his entire life. She wouldn't let it go so far she would feel bad or sorry for him. He still had many outs. He groaned but wisely kept his smart mouth closed once he saw that Mettaton was here as well.

"Well, this is certainly something." Mettaton looked over at Papyrus who chuckled.

"Hey. Go figure we got the frisky Frisk." Papyrus smiled completely oblivious to the pun even as Sans started chuckling. "What?"

"That was a pun Papyrus." Frisk let her friend know the joke before he groaned.

"God I get no reprieve of anything do I?!"

Everyone chuckled but when Mettaton looked over at Frisk she waited to hear him tell her how sick this was. "You're certainly something."

"Ugh barf." Sans growled out. "Could it be more sick in here or what?"

Frisk turned a glare at him before smirking and Sans felt a shiver down his spine. "Alright pet. You want something to happen so it's not sick. I'll make do. Mettaton? Care to help me?"

Sans struggled against the collar and handcuffs once more as they got closer and closer with Papyrus holding his arms behind him he struggled as Mettaton looked him over before sitting on the chair that Frisk had been sitting on before. Then before Sans could say anything his face was shoved towards Mettaton's metal dick. He kept his mouth closed and glared at Mettaton as the robot placed his hands on either side of Sans' face.

"Hmmm. Are you going to be good and open your mouth or am I going to have to punish you?" Papyrus asked knowing how stubborn Sans could be.

Sans growled but not wanting to let Frisk see the kind of punishments that Papyrus gave opened his mouth anyway. Frisk scoffed at this and walked over with the crop making even the brave Papyrus back off.

"Oh I see how it is! You'll let Papyrus order you around but when I request the same thing you tell me to drop it. Or nice try." Frisk hated how she could feel anger taking over thinking for sure it had to be the hormones right? "You know what. No. You obey my orders or trust me you aren't going to like the punishment."

"Fuck you!" Sans growled back, he was already nervous and didn't need this bullshit too.

Frisk glared before turning to Papyrus. "Papyrus dear, would you do me a favor and go get that other tiny bag we got while shopping. It seems Sans here is in need of it."

"I'll get it myself." Mettaton replied with a soft smile before standing from the chair and leaving the room.

"Well that makes the next part a little less embarrassing. Papyrus would you mind pleasing me just a little. I'm in need of it. Remember go slower than you normally would. Don't want you to start Morning Sickness."

"You can't be serious!" Sans yelled in horror. "Frisk! Tell me you're fucking joking!"

Papyrus ignored Sans and smiled. "Sure thing. You're the boss this time around. Though to be fair… I don't actually know… uhm how to pleasure…"

"It's ok I'll teach you." Frisk replied with a smile which made Sans livid.

"Hey asshat! She's mine! Fuck off!" Sans growled only to see Mettaton come in and look at the inside of the bag confused.

"Oh hey Mettaton… Mmmmm." Frisk moaned softly as Papyrus had removed her panties and skirt and began to gently finger her. "I'm a little tied up at the moment. Perhaps you could put the muzzle and corrective ring on our little pet over there.

Sans was horrified that Frisk would even do this. I mean yes they had set up a tap out but they had never had to use it before. Though he'd be lying if he said he didn't find it sexy to see his brother pleasuring Frisk with his tongue. He glared as Mettaton walked over to him and when he opened his mouth after a few minutes to tell him to fuck off found a ball in his mouth that was wrapped around his skull and he couldn't get it off.

Couldn't talk at all and it annoyed the heck out of him but what annoyed him more was when Mettaton went towards his member and unable to stop him he could only watch and moan as a black ring was put on around the head of it. He groaned once then glared up at Mettaton who was ignoring him and looking at Frisk.

"Thanks Papyrus. How about showing your lover some sugar?" Frisk smiled at him and Mettaton jumped at the opportunity.

They kissed each other like they would never see each other again. It was as if they had been forced to withstand hours of torture rather than a few minutes apart. It made Frisk smile widely and while Sans would have loved to voice his hatred for the scene the gag in his mouth prevented it. Leaving him groaning and grunting in displeasure.

"Oh that's right it's your turn for some punishment." Frisk turned to face the glaring Sans and began to kiss his neck and nibble it and bite it.

Sans was grateful he was being pleasured, that was until he realised what the ring was doing. He couldn't cum. No matter how much stimulation he got or how close he felt he couldn't come. He began to groan for different reasons. Began to groan in a pleading way. BEGGING to be allowed to cum. This felt like agony. Worse than hearing Mettaton gasp at Papyrus sucking him off. Frisk stopped what they were doing but didn't remove the ring which received a whining groan from Sans behind the gag.

"Wow. If I may offer some pointers. Try teasing these while you suck." Frisk replied gently touching Mettaton's balls which made the robot shy away. "Don't worry. I won't touch you now Mettaton. Take it easy. Besides. A gangbang would be hard If I was touching you."

The wink made Sans groan and shake his head no. This was too much. He should tap out! He should call it quits! So why WASN'T he? Was it because he wanted to cum more than he had ever wanted to in his entire life? He couldn't bear to see his little brother doing such lewd things with Mettaton and looked down hoping if he did he could cancel out the groans of the robot as well.

Frisk watched knowing it was hard for Sans and after only a few minutes pulled him into a hug. She knew she was supposed to be punishing him but she wasn't heartless. She knew how hard this was for him to see and know about let alone hear, and so while hugging him began to whisper in his ear telling him to focus on her voice. To listen to what she was saying. He shook for a bit in rage but eventually was able to listen to Frisk and halfway ignore the other two.

"Alright you two." Frisk stated after a few minutes and Sans couldn't help but look at her. "I think it's time we reward our pet here for being so good as of late what do you think?"

Mettaton grinned and looked over at Papyrus who had some sweat on his skull from being so keyed up from earlier when Metta and he had switched over. "It's always been one of your fantasies right?"

"Nyeh!" For once in Sans' life he saw Papyrus blush and look away from something. "T-That's true but…" He was stuttering too? Wow. He must have really wanted whatever the plan was for a while.

"Ok then. Let me just get on the bed here…" Frisk climbed in and Sans growled mentally behind his gag. He wanted to pound into her so bad. "Like so. Now Papyrus because I know he'll obey you the most, care to remove the ring?"

"Uh yeah." Papyrus seemed to leap off the bed and over to Sans before slowly removing the cock ring which made Sans moan but strangely not shoot like he wanted to.

"Now. Knowing how dogs are…" Frisk winked at Sans and he gulped, what was she planning. "Mettaton… Care to help me out here."

Mettaton chuckled lightly before gently pulling her legs apart and Sans began to struggle thinking that Mettaton was going to fuck what was his and he really WOULD kill the robot if he did that. Suddenly he felt the hand cuff from his left hand released and his eye darted over to Papyrus who had released it only to then place it back on once it wasn't around the bed anymore holding him back. He glared as best he could at his brother.

"Be good and make yourself a hole." Sans growled at that, like hell he would, past the gag at his brother yelping when he was yanked closer to him and found himself straining his spine.

The order was clear and he closed his eye sockets in slight shame but did so shocked when it got an immediate answer and he was allowed to relax his spine a bit. Not only that but the handcuffs were removed and he went to touch the gag.

"You remove that you'll be back on the floor!" He blinked over at Frisk who was glaring at him. "Are you going to be a good dog and get over here or are we going to have to teach you more manners?!"

Sans sighed but walked defeated over towards Frisk hoping if he obeyed the others would leave them. No such luck. Once he arrived Frisk smiled at him then looked at the others.

"Ok. Now then. I know what you want Sans." She lay back on the bed gently and Sans followed suit. "If you're good I'll remove the gag as well. Now then… How about you take that throbbing member of yours and put it in here." Sans' blush deepened as he completely ignored the other two men in the room.

But Frisk wasn't. This was the plan she had been texting them about, as for the idea… well the original idea came from an unlikely source. Hey being friends with your dad in a previous timeline had it's perks. Sans slowly slid into Frisk yearning for her folds and such. Once he was in, he could only groan, she was still tight. When his eye sockets closed in pleasure at finally getting what he wanted Frisk acted.

She gave a slight nod to Papyrus who moved and before Sans could realize what was happening found his hole being filled by his own brother. He was horrified because he couldn't escape now and despite the gag groaned in shock and horror until he heard Papyrus moan loudly and he wanted to disappear for a second then looked over at Frisk as he felt her hand on his skull.

"It's ok Sans." He looked at her and could only feel at peace as she smiled at him. "Don't worry. You'll like this. It's weird for me too but we all knew that you would not be ok with either of them having anything to do with fucking me."

Sans couldn't believe how Papyrus laughed and Mettaton said yes. This was all being run by Frisk, even now. It was a weird feeling Sans had to admit but it didn't hurt. He'd taken his brother in both possible holes before sure, but to be filled and filling his girl felt… nice. Suddenly he felt Papyrus move which caused him to move himself and groan loudly, which in turn caused Frisk to cry out in pleasure. He no longer cared what had caused this little pile up, it felt amazing.

Frisk seeing the change in him reached up between moans to remove the gag and that caused the room to be filled with the noises of four people truly enjoying themselves. After a few minutes Sans couldn't believe how incredible it felt to be filling Frisk while she cried out in joy unable to stop his own cry as he was filled barely hearing Papyrus who cried out along with Mettaton. Panting he slowly came back to the real world to find that Papyrus was pulling out of him and both Mettaton and Papyrus were waving at both of them.

He pulled out slowly and collapsed next to Frisk still recovering from such a strong orgasm. Frisk moved placing her head gently on his ribs. He couldn't have stopped his arms from wrapping around her if he tried. For once it was nice to hear Papyrus and Mettaton sleeping upstairs. Their snores could be heard from where he was and it was ok. He looked over at Frisk upon hearing his name.

"That wasn't to much was it?" Frisk asked and only then did Sans give a light chuckle. "I thought you would tap out a few times… I was worried that I had gone to rough, or hard, or…"

He silenced her with a kiss. It was so like Frisk to worry and think over things that she had done to please him. When he pulled back he still couldn't find his words and kissed her again.

"No." This time when he pulled back he had his words. "It wasn't to much. It was amazing. It was hot. It was like back in highschool when Paps and I were getting kind of tired of the same old same and tried new things without telling the other the plan. Honestly I didn't think a goody two shoes like you would have the guts, heh, to do something like that."

Frisk scoffed and pushed on his ribs gently and quickly getting a gasp and chuckle out of him. "There's a lot you have yet to learn about me in the bedroom." Frisk smirked at him.

Sans smiled right back and then kissed her head. "I cannot WAIT to learn." He yawned at that moment. "But let's learn more later. I'm exhausted after all that."

Frisk yawned as well and smiled. "Oh I suppose." She teased him. "But it will cost ya. One night of letting me sleep on these amazing rib bones of yours."

Sans chuckled right back feeling his own eye sockets closing. "Deal." Within moments the room was filled with snores and after an hour the sound of a phone dinging.

It didn't disturb them at all.