Luna spent the day grinning to herself, there was no way Hermione was going to go through with her challenge and she was just waiting for her to forfeit. But as the day continued and as each class went by she was getting nervous. What if Hermione was also just waiting for her to throw in the towel? Fuck, that would mean they both lose which was not the same as winning at all. As the night settled and she had packed her bag for term break she realised the only way to win seemed to be sleeping with Crabbe. The thought of sleeping with the school bully was certainly not something that she was excited for, but she did like the idea of laughing at Hermione and showing her that there was no name she couldn't handle. So, she headed out towards the Slytherin common room to find him; he was notorious for stalking the halls down there at night, this probably had a lot to do with his less than welcomed presence among his fellow Slytherins. But it was late, and she had to sneak through the corridors to avoid detention, so she had low hopes for finding him.

These fears were unwarranted as she turned the corner and saw Crabbe looking out of a window, staring into the dark lake. At least he didn't look angry so she felt less nervous approaching him but that didn't change she had no idea what to say to him. She took a deep breath and told herself to just do it and walked towards him and sat on the windowsill next to him. He didn't hear her coming and was shocked to see her sitting next to him.
"What the hell are you doing here Lovegood?" Crabbe glared at her and it was clear she was certainly not welcome here. His tone was poison and she was sick of him thinking he could push everyone around.
"Do you have to talk like that Crabbe? I'm not scared of you and you would get more friends if you weren't so vile to everyone."
Crabbe looked stunned at her blunt observation, "Whatever Lovegood just piss off. You don't know shit about me."
"So, what?" Luna was not about to let him walk all over her, "I didn't say I know you I said that you could make friends if you weren't so cruel. I don't need to know anything about you to point that out."

Crabbe glared at her and turned back to stare out the window. He sighed, and she couldn't help but feel bad as he could hear the weight of his burdens in that exhale.
"Why are you here then Lovegood?"
Luna paused, she had a mission here, but she didn't need Crabbe knowing about the deal in case he wanted to go telling people. So, it would seem she needed to just rely on some old fashion seduction here. She moved closer to him, making sure her nightdress shifted up her legs and leaning forward so he could have a sneak peek at her cleavage.
"Maybe I'm just here to see you," Luna purred.
Crabbe noticed the change of tone and looked at her quizzically. This was not a normal interaction for him especially not with someone from the ever-perfect gang of heroes. God, he hated that group and the way everyone acted like they could do no wrong. But he would be lying if he didn't admit he was tempted and a surprisingly large part of him was hoping that this scenario was exactly what it looked like. His unpopular status meant it had been months since he had had sex and though he may hate the group of heroes that didn't change the fact that Luna was gorgeous and the idea of having her body against his was making harder than he'd like to admit.

"Well here I am. What do you want with me?" Crabbe felt like he was testing the waters, making sure they were on the same page.
"I want us to do something crazy," Luna's hand slipped up his leg, cupping his now growing bulge and watching his eyes open wide, realizing exactly what that meant.
She loved that he looked so shocked, she loved that everyone assumed she was this little naïve girl when she was running around fucking everyone for a bet. She felt so powerful and being able to make the school bully desperate for her would just add fuel to that fire.
She moved closer to him, moving her face near to his so he could almost taste her.
"What do you want us to do Crabbe?" she whispered, her lips nearly touching his. "What kind of things gets this Slytherin hard?"
Crabbe couldn't handle her teasing and he pulled her into him, so they collided, and he was feasting on her sweet lips. She could tell he wanted it bad by the way his hands pulled her close and roamed under her nightdress, desperate to touch her. He cupped her breasts and pinched her nipples making her whimper and bite his lip in retaliation. He moaned at the feeling and Luna wondered if they were really going to fuck right here in front of the Slytherin common room.

A hand moved away from her breast and roamed downwards, slipping under her panties and slipping over her wet lips. She felt a moan growing just from the anticipation and kissed him hungrily to let him know that she wanted this.
With this encouragement he slipped a finger inside her and she let out a gasp, she was so horny for this, she wanted to know she could make anyone want her and she loved that she was tearing down her own boundaries.
Crabbe moved his finger in and out of her slowly and quickly added a second and placing his thumb on her clit rubbing gently and slowly.
"I'm going to make you feel so good my mistress. I'm going to make you moan and cum and them maybe you'll let me take you," Crabbe whispered in her ear before putting his mouth back on hers and slipping his tongue inside her mouth.
Luna had no idea what he was saying but she knew it felt good having his fingers slipping in and out of her wet hole. He was moving slowly, and it was driving her crazy, he wanted her to cum hard and he was edging her there slowly to make sure it was good.

Crabbe used his free hand to lift her nightdress up to her neck and moved his mouth from hers onto a nipple and sucked hard. She was trying to keep her voice down, but he was making it hard. Knowing that anyone could walk over and see her being pleasured by Crabbe right here in the hallway made her even wetter, she loved that danger, she loved that she was naughty like this.
He bit her nipple and rolled it between his teeth and pushed deep inside her and that pushed her into her first orgasm for the night. She moaned over and over as he kept pushing his fingers into her, drawing it all out.
"Did you like that mistress?" Crabbe looked at her hesitantly, obviously nervous for her answer.
"It was incredible. Why are we stopping? I want to keep going."

Crabbe grabbed her hand and walked her over to a small room she assumed was a broom closet. When they entered though there was just a single bed and an armchair with a few books and personal items.
"I need my own space sometimes," Crabbe explained, "I'm not exactly the most popular around here."
Luna felt bad for him but didn't know how to respond so she simply walked up to him and kissed him on the mouth, letting their tongues slid together then pulling off his shirt and pushing down his pants and underwear. He kicked them to the side and lifted her nightdress over her head, the whole time their lips hungrily seeking each other.

"
Luna expected him to rip off her panties and take her roughly, but he paused and sat down on the bed and got on his knees in front of her.
"What do you want mistress?" Crabbe kept his head low and awaited an answer.
"Fuck this is what he's into? I didn't see that coming," Luna thought. It turned her on though, the idea of the big bad bully being her little slave made her smile.
"I want you to lick my pussy Crabbe," Luna purred, "I want you to make me cum all over your mouth."
"Yes mistress," Crabbe replied, and he moved between her legs.
He gently laid her back and pulled off her panties before spreading her legs wide and looking at her sexy bald pussy.
"Just tell me if you want something mistress and I'll do it," Crabbe muttered before putting his mouth on her wet lips. He lapped and licked like her was desperate for it and it only took a few seconds before she was writhing and gasping under his touch.
"Fuck yes Crabbe keep going, I need to cum," Luna moaned, putting her hands in his hair and pulling him into her.
He sucked hard on her clit and that was all it took for her to cum again, moaning his name while he licked her clean.

"Mistress can I use some toys on you?" Crabbe inquired, "I want to keep making you feel good."
Luna wanted that so bad and she could see how hard he was and the idea of making him wait with a throbbing erection while she came again and again was hot as fuck.
"Yes, you can. I want you to use toys on me and make me feel good again and again. If you are good I might even let you inside your mistress and I'll make you feel good."
Crabbe groaned at the idea and reached under the bed, dragging out a box and opening the lid. She glanced down and saw an assortment of toys that made her insides clench.
Crabbe selected a vibrator and a large, thick dildo and spread her legs wide again. First, he positioned the dildo at her drenched hole and slowly pushed it in, she moaned as it stretched her open and filled her up. He continued to push it in until it was all the way inside her and she was gasping at the feeling of being filled so good.
"God yes I want you to fuck your mistress good Crabbe. I want to cum with this fat dildo in me."
"Yes mistress," Crabbe was so horny for her. Hearing her call herself mistress made his cock twitch with anticipation.
He pulled it out slowly and pushed it back in with a torturous pace that was making her gasp and try to push against it. She could only handle it for a few minutes before she was getting desperate and frustrated.

"Fuck me hard Crabbe. I don't want it slow I want you to make mistress cum."
Crabbe obliged immediately and slammed the dildo into her again and again. It felt so good, Luna was moaning his name while he slammed it into her rough and hard.
"Fuck Crabbe I am going to cum soon. Make me cum. Mistress wants it so bad."
It didn't take many more of his hard thrusts before she was coming undone.
"FUCK YES. GOD IT FEELS SO GOOD."
When she had finished her orgasm, Crabbe pulled out the thick dildo and set it aside and she thought he would fuck her now, but he wasn't done with the toys. Without giving her a moment to pause he turned on the vibrator and laid it on her clit.
"I want to keep making you feel good mistress," Crabbe's voice shook with desire.
Luna was feeling too good and was busy moaning to answer, she knew this was going to be a quick one, he was already upping the speed on the vibrator and rubbing it into her clit.
Just as she thought a minute later she was exploding with another orgasm, moaning with release and clawing at the bed sheets.

He turned off the vibrator and threw it back in the box and she heard him quickly rummaging for something, she didn't know if she could handle more toys and she wanted to fuck him, so she looked up to let him know she was ready.
But when she looked up he was holding a long, red, riding crop and presenting it to her and she realised what he was asking for. And she loved that.
"Get on the bed, hands and knees."
Crabbe quickly obeyed, handing her the crop and getting in position.
"You made mistress feel good and I will reward you for that but first you need to be punished don't you."
"Yes mistress," Crabbe moaned, and Luna realised how bad he wanted this.
"Your safe word will be Ravenclaw," Luna ran the crop over his ass and watched him shiver with anticipation.
"Yes mistress, I understand."

As soon as she had that confirmation she struck his ass with the crop and he let out a quiet moan.
"You think you're better than mistress, don't you?" Luna asked, striking him again.
"No mistress. I am just your slave."
She hit him again, "No you run around the school trying to make me scared of you. Do I look scared Crabbe?"
"Of course not mistress. You could never be afraid of me."
She hit him 3 times quickly, his ass was already red from the strikes. She hoped he would feel this tomorrow.
"You're right. I am never scared of you." Luna struck him again, once on each of his ass cheeks. "How could I fear you when you're bent over for me like this."
Crabbe was panting and gasping, obviously enjoying the pain.
"I love being your slave mistress. I love making you feel good. I love feeling you dominate me."
She struck him 3 more times, harder this time.
"This is a punishment Crabbe. It's not a punishment if you enjoy it."
"Sorry mistress," Crabbe still moaned despite his apology. "I deserve the punishment."
Luna was getting wetter and wetter, she liked this dominating feeling, she loved seeing the red marks all over his behind and knowing he was desperate to be whipped but she also knew she wanted to fuck him and was getting too horny to wait.

"You have been good to mistress tonight though Crabbe," Luna said, slapping the crop against his skin again and again, "and I do want to reward you for that."
Crabbe moaned, "that sounds so good mistress. I just want to make you happy."
"Having you bent over does make me happy," Luna replied, moving her strikes to the backs of his thighs.
Crabbe's fists were clenched around the bedsheets, he was so hard it was almost unbearable, but he loved that she had taken up the role of mistress so easily.
She continued to hit him again and again.
"Do you know what else would make me happy?" Luna asked while continuing her strikes against his legs and ass. "To ride your cock until I cum all over it."
"God I would love that mistress. Please let me feel you cum around my cock."
Luna hit him two more times and then threw the crop on the ground.
"Get on your back then and let me ride that cock."

Crabbe followed her order instantly and she straddled him, positioning his cock between her legs. He was just as thick as the dildo he had used on her but much longer, so she knew she was going to be filled to the brim. With that thought she sank down and they moaned together as each inch stretched her open.
When he was fully inside her she paused for a second, letting her body adjust to his thick cock.
"God you feel good Crabbe. I can't wait to cum all over this cock." Luna was panting and ready to start riding him.
As she began to bounce on his cock Crabbe reached up and played with her nipples.
"Mistress you feel so good around my cock," Crabbe groaned as he pinched and pulled her nipples, "you're so wet and soft and tight."
"Yes Crabbe, this is how wet you've made me tonight, you've been such a good boy," Luna could already feel an orgasm building, she was so sensitive after everything he had done to her tonight. "What do you want as a reward?"
"Please cum on my cock mistress," Crabbe whimpered, "I want to feel you squeeze me tight."
"Fuck yes. I will cum for you since you've been such a good little Slytherin slave."
She placed her hands on his chest and bounced fasted over his cock. After only a minute or two of her increased pace she was cumming.
"Oh God Crabbe I'm cumming," Luna moaned as she felt her release. "Fuck I am cumming all over your fat cock."
Crabbe had to focus all his willpower on not cumming right then. She was so hot, and it felt so amazing it was hard not to spill himself inside her right then.

Luna was exhausted from all the orgasms and she knew she only had one round left in her and he was going to have to do all the work.
"I want you to fuck me," Luna gasped, "I want you to show mistress how much you want her."
"Fuck yes mistress," Crabbe held her tight and flipped them, so she was lying on her back and she was between her legs. He had managed to move them without slipping out of her and he put her legs over his shoulders and began to thrust deep, fast and hard.
Luna was moaning instantly and clawing at the sheets while he hit a sweet spot inside her with each deep thrust.
"Merlin mistress, you feel so good. I want to cum inside you so bad."
Luna moaned at his words and knew they were both so close.
"Fuck me hard until we cum Crabbe. Make your mistress cum one more time."
Crabbe took her legs off his shoulders and pushed her knees up to her chest and slammed back into her again and again.
Luna loved feeling exposed and slutty like this and she knew she was going to cum any second now.
"Mistress is going to cum," Luna moaned, "cum with me Crabbe."
Crabbe groaned and pushed deep inside her three more times and they both screamed with release.
Crabbe moaned her name as he came deep inside her and she came so hard she saw stars.

Crabbe laid down next to her in the small bed, his eyes shutting and muttering something about sleeping. She would love to sleep here too, she was so tired and spent but she needed to get back to her own bed and rest for her trip to the burrow tomorrow. She slipped on her panties and nightdress and smiled as she saw the bright red marks on his body.
As she slipped out of the room she giggled to herself knowing she would not be bothered by Vincent Crabbe anymore.