((A/N: Thanks to dream1990, JasherTheDarkened, Aperture Survivor and Meg for your reviews))

Sans suggested that they go back inside to have some privacy and gently asked Papyrus to leave them alone. Papyrus seemed confused but did as his brother requested.

Frisk was alone with Sans again, and she began to fidget as her anxiety flooded back. He was mad, wasn't he? What was he going to do? She began eyeing the door, wondering if she could make it out before Sans got to her, before pushing that idea aside, Sans would always 'short-cut' to her…

"kid." Sans grabbed her attention gently. He seemed… calm, and maybe a little guilty. "don't worry, i'm not gonna hurt ya… yet. i just, i just need to ask ya some questions." This only made Frisk more anxious, but she nodded anyway.

"you made, you made a deal with her, didn't ya. with the sloth demon?" He asked her, Frisk's eyes widened, but she nodded again.

"and that's why… you're like this? why you don't have a human soul anymore?" He asked, he appeared like he already knew the answer, but he needed to make sure that his theory was correct.

Frisk's itching feeling came back, but she still couldn't quite figure out what was going on, "Yeah, but, how did you know?"

Sans looked down darkly, "because i made a deal with her too." Frisk gasped in surprise, and Sans continued. "look. how 'bout we each explain our stories because it appears to me that i must be missing some of the facts because you must have been pretty desperate to make a deal with a demon."

Frisk felt tears pool up in her eye sockets and fall down her face. Sans' eye sockets widened in concern. "I'm sorry Sans! I didn't know, I didn't know that they… I didn't, I'm sorry, please don't hate me! Please, please…" Frisk didn't care that she was finally talking like normal, she had wound herself up into a panic. She felt Sans' hands on her shoulders.

"shh, shh… it's alright, just, just tell me what happened, okay." Sans sounded so concerned, that Frisk just let it all spill out. How she RESET the first time, what happened to Chara. Chara was a story in themselves, since she hadn't told the others about them before. She cried harder when she began to explain to Sans how things got worse with Chara every time Frisk RESET, the games that Chara would play to mess with Frisk, and how Frisk tried to tell Sans before but Chara wouldn't let her. Frisk was sure she was a blubbering mess by this point but Sans seemed to understand what she was saying, and rubbed her back gently. He seemed pretty disturbed himself, there had been times that he had threatened this kid, while she was experiencing the same hell as him. He felt horrible.

Finally Frisk came to the last part of her story, how once everything was ERASED, she was about to RESET when the demon appeared and offered her a deal, and how she was so desperate that she couldn't refuse. "… Please, Sans, please believe me! I n-never hurt anyone, I, I would never hurt Papyrus. Please Sans, I swear, I swear I'm not lying" She begged him.

Sans' smiled grimly, "kid, i believe you. things actually make a lot more sense now… i'm sorry, i was pretty harsh on you before. and to think i almost attacked you today when you-," he cut himself off. "kid, i know you probably won't be able to forgive me but-" Frisk interrupted him by giving him the tightest hug she could. Sans was surprised for a few moments before chuckling and hugging Frisk back.

Frisk felt so exhausted, but she was so happy, this was everything that she had wanted since the second RESET. Sans believed her! And he had forgiven her! She began to shake as she cried tears of joy into his shirt. Sans froze as he felt them, but relaxed when Frisk looked up and smiled sweetly at him.

How had he ever thought that this little angel had been the same child that had hurt everyone he had cared about. He remembered her from the first ever timeline, and even after he had seen her die so many times to Undyne, Mettaton and all the others, she never had fought back. Here she was again, smiling so sweetly at him after he had done everything he could to intimidate her earlier. It was odd, but for some reason it reminded him of Papyrus.

Sans waited patiently for Frisk to stop crying, rubbing her back softly. Gently, he pushed her away so she could see his face and sat her back on the lounge.

"guess it's my turn, huh? alright. when we were kids, after our father… i had to look after papyrus, but… papyrus was born weak, i think it's similar to humans with genetics, but sometimes monsters are born with problems with their souls and they get sick all the time and struggle to do what other kids their age can. it was hard because all papyrus wanted to do was play with the other kids, make friends, join the royal guard when he got older, be a hero, and i, i didn't know how to tell him that he could never do those things.

"one day when i was taking a short-cut home something interfered, keeping me in the void, ah the place between destinations, before i bounced back to where i was supposed to go. it was them, the demon, and from what you described before, they were that same demon that you met. they called themselves falmercia, and she offered to make papyrus feel better, told me all i needed to do was exchange my soul for one that she created, claiming that a real soul was more valuable to demons.

"well, i accepted, and when i got back, papyrus was already doing better. i really thought that i'd gotten off easy until i noticed that my new soul was getting me tired all the time, and then when i checked my stats they were all ones. papyrus, of course, doesn't know, i couldn't tell him because i knew he'd feel guilty."

Frisk nodded in understanding. Sans looked up at the clock to see that the two of them had been talking like this for hours. Sans stood up.

"kid, i think it's about time we let papyrus back in, he's probably worried sick." Frisk smiled up at Sans and gave him another hug. When she pulled away she became embarrassed, hesitating before forcing herself to speak.

"Do you mind if I call you two my brothers?" Sans' eye sockets widened in surprise from the question, before softening.

"only if you don't mind me calling you babybones." Frisk blushed but shook her head.

"I don't mind."

"that's good, 'cause i wasn't really asking." Frisk pouted and followed Sans to the front door. They found Papyrus sitting a few feet from the front door with his arms wrapped around his legs staring sadly to the street. Frisk felt a pang in her chest at the sight, running up to him and giving him a hug from behind.

"FRISK! I'M GLAD THAT YOU HAVE FINISHED TALKING WITH SANS I WAS GETTING REALLY WORRIED WAITING OUT HERE." His eyes were filled with concern. "IS EVERYTHING ALL RIGHT?"

"yeah, i was just talking to babybones here about her low stats, since we're both pretty boned in that department." Sans patted Frisk on the shoulder gently.

"SANS!" Papyrus groaned, making Frisk giggle. Papyrus sighed looking down at Frisk, "LET'S GO BACK INSIDE, IT IS TIME I STARTED TO PREPARE DINNER FOR EVERYONE."

Papyrus went past Sans and into the house, and Sans and Frisk left by themselves giving each other a look that said 'stars help us' before following him back inside.

Frisk tried to save the day by offering to help in the kitchen, but Papyrus refused and told her to relax and she didn't need to work so hard on her first day as part of the family.

The mention of 'hard work' made Frisk yawn and she joined Sans on the couch, who was already snoozing away. She decided that it wouldn't hurt to close her eye sockets for just a few moments…

"FRISK!" The first thing Frisk saw when she was startled awake was Papyrus' face only a few inches from hers. "I HAVE FINISHED PREPARING DINNER."

Frisk turned to Sans, who was also slowly waking up, and back to Papyrus, who had gotten impatient and decided to pick her up and carry her to the table. Sans appeared a few moments later, and Frisk could see him staring at the food warily.

When she looked back to Papyrus he was staring at her expectantly, so she hesitantly took her fork and twirled some of the spaghetti around it. Giving it one last look, she put in in her mouth.

Admittedly, it didn't actually taste as bad as when she was human, but it was still pretty terrible, and the fact that she couldn't force it down any faster didn't make things any better. Seeing Papyrus was still looking at her, she forced a smile and gave him a thumbs up. Papyrus grinned wildly and switched his attention back to his own food.

The three made idle chit-chat, Papyrus asking Frisk a few questions about her and where she had come from and Sans having to rescue her a few times.

"I AM GLAD THAT YOU TWO ARE GETTING ALONG NOW," Papyrus commented, making Sans and Frisk both wide-eyed.

"pap, you, you noticed that there was something wrong?" Sans asked nervously.

"OF COURSE I NOTICED, I, THE GREAT PAPYRUS AM A VERY PERCEPTIVE PERSON, AND I KNOW MY BROTHER VERY WELL AND KNOW WHEN SOMETHING IS BOTHERING HIM." Papyrus proclaimed, and Sans chuckled nervously.

Frisk finished her plate, "Thank you for the food… brother." She said in a nervous voice, unsure how Papyrus would react.

Papyrus was silent for a brief moment before grinning wildly, "IT WAS MY PLEASURE, SISTER!"

Sans and Papyrus finished their own plates and Papyrus brought them to the abnormally high sink and cleaned them up. they moved to the living room and frisk yawned loudly.

"i think it's bedtime for babyboneses." Sans pointed out. Papyrus eyes widened in glee.

"TIME FOR THE SLEEPOVER TO BEGIN!"

"good idea bro, i could use some 'z's right now."

"BUT THAT'S JUST BECAUSE YOU'RE A LAZYBONES." Papyrus groaned before picking Frisk up again and moving up the stairs.

Papyrus and Sans left Frisk in Papyrus' room to get changed into their pyjama's, Sans promising to get the kid some new ones tomorrow. Frisk took off her shoes and socks and placed them neatly by the door.

After waiting a few more moments she decided that she could wait by sitting on Papyrus' bed. She should have known better though that with her knew soul this was a slippery slope, and before she knew it she had fallen asleep.

She was lightly brought out of her slumber when Sans and Papyrus entered the bed. The bed wasn't really made for three people, but they all fitted snugly, and Papyrus had grabbed her like a teddy bear.

"G'night" She mumbled, still half asleep.

"GOODNIGHT SISTER!"

"sweet dreams, babybones."

She wished.