Sans is a MONSTER and not a HUMAN, so he doesn't follow HUMAN biology like a HUMAN skeleton. Same with Gaster and Papyrus.    

More intimate moments. Aaaa. 

Don't worry though - for those of you who aren't really into reading the really intimate moments that can happen between Sans and Frisk (like in part 75...), then you can read most of the chapter as nothing really happens until near the end.

But yeah just a warning for y'all who only like the fluff. 

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Never having really been one to taste Papyrus' cooking, the oldest brother was surprised to find himself actually liking what his little brother had prepared for them to eat. Frisk was the same, enjoying the food that had been plated before them as they sat at the table together, like they were just some kind of... Normal family or something. It was nice. Nicer than feeling like the three of them had to hide in the headquarters back home, feeling like they wouldn't be allowed to go outside. "this is really good, bro." Sans had decided to compliment his brother, who returned a wide, grateful smile.

"THANK YOU, BROTHER! IT'S NICE THAT WE ALL GET TO EAT TOGETHER." Papyrus mentioned exactly what Sans had been thinking. Because they were no longer separated by their jobs, and they were living in the same house, they actually got to see each other more often. Even though Sans did feel like it would make things a little difficult for him and Frisk to have... Romantic moments together with a third person in the house, but he wasn't really complaining. He was happy Papyrus was here, that he got to make up for the time the two of them had lost over the years.

 "I agree." Frisk nodded, deciding to take a moment to stop eating her food so she could contribute to the conversation. While they continued eating, Frisk went on to say some more, so they could all chat to one another at the dinner table. "Papyrus, what do you plan to do? Work-wise, I mean." Frisk questioned, knowing he might just have been as clueless as they were about what they wanted to do. She knew that she might just have to look around some stores, or coffee shops... Just something. 

"I HAVEN'T REALLY THOUGHT ABOUT IT." Papyrus admitted, just as he was about to put a forkful of food in his mouth. Slowly lowering his fork back to his plate with a small 'tink', he realised he actually had no idea. What were you supposed to go to after being a failed member of the CIA, (not that anyone on the outside were to know that). But what was he supposed to do, work in a supermarket perhaps? "I HAVE NO IDEA... BUT I CAN LOOK FOR A JOB! TODAY, I CAN TRY TO FIND ONE!"

"today is a little soon, don't ya think? couldn't we just all go out tomorrow?" Sans asked his little brother, who shook his head, not wanting to leave it. Honestly, Sans didn't expect his little brother to manage to pick up a job or even an interview on their first few days of actually living around here, but if he wanted to try... "i just worry about ya goin' out alone in case anythin' happens. we should come with ya." Sans told him, seeing Papyrus shake his head, saying he didn't need to be watched, that he would be fine.

"BESIDES, I'M SURE NEITHER OF YOU HAVE GOTTEN ANY TIME TO YOURSELF IN A LONG WHILE, WITH UNDYNE WATCHING YOU AND ALL." Papyrus mentioned, as he had been there, back at work when Undyne had the couple on all those screens because she had set up cameras and audio recorders all around the apartment. It had been lucky that Sans had decided to be super cautious, because had he not been, they might have been discovered so much sooner.

Knowing that it was true, that they hadn't really gotten any time to themselves, the skeleton and the human glanced at each other in thought. Was Papyrus suggesting that they should have a date or something while he was gone out looking for a job? To tell the truth, neither of them really minded the idea, and it would be nice to actually have some proper time alone after all the hell they had gone through trying to not get found out and then later being discovered. They were supposed to have that date the day they had almost gotten captured. So, maybe they could always have it today, here at home. 

"well... if ya say so, i guess... but just be careful when ya go out, 'k? just in case. i know we're supposed to be safer here but... ya never know." Sans mentioned, while Papyrus nodded, telling his worrying brother once again that he would be absolutely fine, that he could look out for himself. It was difficult though not to smile a little at the fact that his older brother was worrying about him, it just showed that he cared and that meant a lot to Papyrus, that his brother just wanted to protect him.

When the food was eaten, Papyrus volunteered to clean the plates, while Frisk also said she wanted to help out of the kindness of her heart. And once the job of cleaning them was done, Papyrus said how he would go out to see if he could find something, and that he would probably be gone for most of the day. So, they didn't really have to worry about him accidentally ruining their date or something by showing up uninvited. When he was going out the door, the human and skeleton waved to the youngest skeleton, before sighing.

"so... now what? it would have helped if papyrus didn't randomly put us on the spot, now we gotta do somethin'." Sans murmured, not even sure what they could do in this sudden date that had been thrown upon them by his little brother. Though, overall, it was just nice that for a bit, it was just the two of them. Frisk simply shrugged, not seeming to have an idea herself, but she was smiling which showed that she too must have been happy that for now, it was just him and her. "heh, c'mere." Sans reached to gently grab one of her hands, pulling her close to him so he could gently place a kiss against her lips. Fluttering her eyes closed, she happily moved her lips into the kiss, cherishing every single kiss that the both of them shared. 

"i know we're suddenly gettin' all sappy here, but i just wanna randomly say for the hundredth time how much ya mean to me. that i am happy we get to live here together." Sans told her, seeing her quietly laugh and stare back at him with a wide beaming grin. She felt the exact same, knowing that the moment she had seen this house that they were going to be staying in... She honestly hoped they were able to remain here. It looked and felt like the perfect house. A house that might just one day be fitting for their possible future if they were to... Get married, have kids... Frisk hoped things like that would happen for them. She wished for them so dearly. 

"You mean so much to me too, Sans." Frisk softly spoke,  wanting to make sure every word she said was just soaked with genuine meaning. She meant all that she said, with how important he was to her. Her love that she had for him couldn't have been as strong had she ended up with someone else, she just knew that. This skeleton was the man she was meant to be with. "It's why... I decided to be embarrassingly blunt before we had got found out... That I wanted to soul share with you." She blushed profusely in embarrassment, finding that her eyes now glanced away from his at saying that. Especially when she saw the soft coat of cyan blush cloud over his cheekbones, as he must have forgotten with everything that had gone on that she had said that. 

"o-oh yeah... ya did say that, huh..." Sans said, chuckling a little, while she nervously giggled and nodded, knowing she had meant it, despite being as anxious as she had been on her first time with him. She had no idea what such a thing would even feel like, or how it even really worked, she just knew it was a big deal to monsters - to Sans. Though, she didn't expect him to be ready for such a thing, knowing that he had been super insecure about the fact he had once shared souls with Blair, so he might not want to. 

"Y-Yeah... But... If we're not ready then--" Interrupting Frisk, Sans simply crashed his mouth with hers in a passionate kiss, getting her to stop talking before she rambled on about how maybe he wouldn't want to just out of nerves. Well, he was admittedly mostly fearful that Frisk might change her mind when she saw his damaged, cracked soul, considering she had never actually seen it before. It had been the same on their other first time, and he had been afraid that she would not like what she saw. But she proved him wrong.

Deciding to gently pick her up bridal style, Frisk let out a small laugh as she suddenly found herself laying within Sans' arms, with her arms wrapped around the back of his spine as something to hold onto. Sans snickered in return, before deciding to carefully carry her up the stairs, before entering their new room and softly plopping her onto the bed, where he then proceeded to sit down on his knees in front of her. "ya are really sure about this, frisk?" Talk about Deja-vu. He had said the same thing to her during that amazing night they had shared.

"Well... I think so... Soul sharing, it... Doesn't hurt, right?" She asked, and Sans couldn't be surprised she had such questions, considering she was a human who did not really know a lot about it. Shaking his head, he chuckled and blushed a little more as he decided to go on to explain that that's not how it felt at all. 

"matter of fact, while soul bondin' is kinda just a big deal relationship-wise, it's also how monsters kinda... usin' souls is another way for monsters to reproduce, especially if ya are like me, who doesn't really have the anatomy for it." Sans explained. 

"O-Oh... Wait, so are you saying you - a guy, male - would be able to have a child?" Frisk went on, and when Sans simply nodded, she found it difficult to wrap her brain around. How interesting! She hadn't actually known such a thing was possible between monsters, and such a thing probably made it possible for couples like... Grillby and Gaster to have kids if they wanted to. That was extremely sweet. But then it made her wonder... "Neither of us will get... Uh, pregnant, right?" 

"oh, no. i-if, um... if i'm allowed to see your soul, i can show ya how it works..." He spoke, sounding embarrassed at saying such a thing. Blushing like a tomato, Frisk took a moment, before nodding, saying he could see it. Though, she wasn't sure how to bring out her soul, was she supposed to know? Instead, the question she had asked inside her head was answered when suddenly, she saw a strange, red glow - like a red floating heart before her, and that's when she realised... Was that her soul?

"W-Woah..." Frisk stuttered, staring at her own soul in amazement, while Sans laughed a little, still blushing all the while. It was so adorable to see Frisk so shocked by new surprises. Even now, after being together for awhile, they were still learning things about each other, and seeing her reactions to things was always so sweet and cute. Especially with those blushing cheeks of hers. "Is that my soul?" She decided to ask.

"yeah... it's beautiful." Sans told her, causing her to smile shyly in return. "now, ya see the blue glow around your soul?" He asked, just as her soul suddenly became cased in some kind of light blue, glowing light. Wondering what it was, he continued, telling her how it was like what protection was to humans, just with magic. Surprisingly, using such magic wasn't really that taxing on Sans, and even if it was exhausting, he could just go to sleep afterwards anyway.

"This is so much to learn." Frisk giggled.

"yeah... so, um... d-do... do ya wanna see my soul?" Sans wondered, only to get a small kiss from Frisk in return, who nodded, telling him with a calm, caring voice that she would love to see his soul. Staring into those affectionate eyes of hers, all of a sudden Sans just felt... Safe. Like there was nothing to be fearful of. That his fears were just silly, pointless thoughts that needed to be discarded away of immediately. With a small sigh, the skeleton tried to build up the courage, before eventually... He allowed it to appear before him, floating at least a few centimetres away from Frisk's soul. 

"It's... Amazing, beautiful." Frisk whispered after a moment, staring at the upside down heart, that had a couple of cracks actually running through it. By the looks of it, it looked like his soul didn't really glow as brightly as hers did, but it was still stunning to look at despite the damage. Damaged soul or not, Frisk still adored this man all the same, nothing would ever change that. 

"heh... thanks." Sans blushed, while his own soul was also covered by a magical glow, likely to protect them from any kind of accident. Staring at their souls floating mere centimetres away from each other, Sans' pupils nervously looked elsewhere, as he found it difficult to look Frisk in the eye when such a madly nerve wracking thing was happening. This was something that was a big deal to a monster... Well, a big deal to both of them. "ya ready...?"

"I think so... The question is, are you?" Frisk wondered towards the hesitant skeleton, who glanced back towards her and nodded. Just because he was hesitant, did not mean he didn't want this to happen. It was just... Difficult not to think back to such a moment when this had happened with Blair, and it had just been a waste in the end. But this was Frisk, not Blair. Frisk was different to that literal monster, she was a girl who he believed in, to the very end. So, deciding that he knew what he wanted, he decided to gently hold onto Frisk's hands with a shy smile, before going to carefully allow his soul to float up and touch against Frisk's. 

And just a single touch was enough to get the couple to softly moan with one another.

"a-ah... i love ya... i love ya so damn much." Sans quietly groaned, staring back at Frisk's blushing face which looked like it said the same as what he had just said - that she adored him greatly. It was so madly humiliating how sensitive souls could be though, as just touching them together alone was enough to make the couple feel twinges of pleasure just engulf every fibre of their being. It made the both of them feel loved, cared for, with how much they clearly cared about each other. 

"Mmmm! I l-love you too, Saans." Frisk moaned in return, before they decided to share a kiss, making noises into each other's mouths in unison with how wonderful this felt. Sans never expected himself to enjoy such a moment ever again. Hell, he never expected himself to have such an intimate moment with another person ever again, as after Blair he had just sworn that he wouldn't care if he had died alone. But here he was, bonding his soul with this fantastic girl, one that he couldn't thank this world enough for giving to him. 

Continuing to groan and pant, the couple decided to gently rest their foreheads against each other while they allowed their souls to continue to move up against each other. By the looks and sounds of it, Frisk guessed that Sans must have felt so much more when they decided to use souls, considering he appeared just as desperate as she was. Even she was surprised by how amazing it felt to have their souls touching, she didn't even know such a feeling was even possible, that it wasn't possible to feel this outstanding, but she had been wrong.

"ahh! g-god, frisk... nghh. mmmm! ahhh!" He felt so madly humiliated to be letting out such sounds, but fighting them back when your whole body and mind was full of nothing but pleasure and love was just too much effort. Not just that but he felt it was likely only fair to let his noises go, considering she wasn't holding back either, either crying out gibberish that just didn't make any sense, or she would go on to keep telling him how she loved him, and he couldn't stop saying it in return.

Seeing as it was the truth. He did love her, more than words could ever possibly describe. The more time he spent with her, the harder and harder he fell for her. She was an angel, his angel. One that he would never want to let go of. He hoped with all his soul that they remained together forever. He truly felt that way, and hoped Frisk managed to feel his meaning through their souls being together.

Whining out, Frisk wanted to try and reach for the bottom of her shirt, just to pull it up over her head, so she wasn't overheating as much due to the romantic moment they were currently sharing. Luckily managing to notice this to her relief, Sans went to reach his hands up under her shirt, caressing against her soft skin which made her shiver alongside all the sounds she was making. With his help, she managed to pull off her shirt which brought her some comfort, not feeling as overheated as she once had.

In return, Frisk also helped her skeletal boyfriend, by assisting him to take off his own shirt, throwing it elsewhere when they went to share an affectionate kiss, while still moaning into it. The couple continued to work in a team to make each other feel even more cherished than they already did towards each other; Frisk grazed her hands against Sans' ribs, feeling him slightly shudder against her touch, and he went to run his hands over her tummy and her back, which she enjoyed the feeling of. He also went to deliver loving smooches to the side of her neck, wanting to give her all the love in the world. Of course trying to do all of this with their bodies full of warmth and pleasure was pretty difficult, especially when they started to climb to their finish. 

"Saaans! Oooh, please! P-Please!" She started to cling to him, wanting to hug him close as it felt like perhaps she was already starting to come close to not being able to handle this anymore and that she would just let go. What could she expect with her very first time at doing this? It's not like she was expected to last for ages, right? "Sans! S-Sans, I'm close!" She warned him, which caused him to kiss her, before replying.

"y-y-yeah, nghh! m-me too! g-god...!" Sans panted, sounding just about as loud and needy as she was, knowing he wouldn't last for much longer. Knowing that they were both on the same page though, the two of them just knew they couldn't last anymore. So, holding each other close, the both of them proceeded to whine out together, allowing their climaxes to crash over them, while they panted, and eventually allowed their souls to go back to their rightful places. 

"g-god... that felt... heh." Sans tiredly chuckled, while Frisk let out a small exhausted laugh, as she totally agreed with him. Just right now she was kind of lost for words due to that whole experience they just shared with one another. Overall, it was difficult not to smile, for the both of them, knowing that they had made themselves so much more closer now by sharing such an intimate moment together. They were bonded by soul.

And this time around, Sans felt like it was with the right girl.