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

Author note: SMUT WARNING.
They're on their honeymoon... What ya expect? xD
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He couldn't believe he let him get away. If only he hadn't missed those couple of times when shooting at him, if only he had managed to hit him, perhaps in the head with just one bullet, he wouldn't have to beat himself up about letting him escape. He may have ran away, but now Sans had to think about whether he thought of trying a different tactic. Whether he was going to come after him and Frisk again, or try and hurt someone else. What if he tried to hurt Leo or Luna? Just the thought was enough for him to clench his fists as his sides, as he stomped his way along, back towards where he had left Frisk. If that fucking asshole ever thought of laying his hands on his and Frisk's children, the skeleton would break his damn neck. No one was ever allowed to harm them. Not ever. Those two meant everything in the world to him, just like Frisk did. Sometimes, it was still strange to think that they came from him, his soul... But that made them all the damn more important to him. Nothing could ever happen to them. He wouldn't allow it.

When arriving back into the room that had been utterly trashed by the commotion, Sans couldn't help but notice a couple of people trying to clear up the mess, while Frisk was sitting at one of the tables, seeming to have her arm looked at by someone. Looked like staff. In fact, when he started walking over, he was almost practically ambushed by three other men, who looked like they must have also been staff, with their uniforms...

"You. You're one of the people that caused all this mess, aren't you?" The one in the middle said, seeming to be taking charge. Sans simply rose a brow back towards these people. Wait, so he was going to be the one who was blamed for this? As far as he was concerned, it was self defense, and that asshole-- James, was more likely going to accidentally kill some innocent bystander rather than him. Sans narrowed his eyes.

"i think the main person who ya should be blamin' already made a run for it. maybe ya should go find him." Sans snarled under his breath, even though he knew it was pointless. James was likely long gone by now. He was just pissed off that this was what his and Frisk's honeymoon was turning into today. They could have almost been killed. Frisk could have been killed, if the bullet that hit her shoulder had been a bit higher and moved to the left a little. She would have been shot right in the forehead, and just that thought made him shiver.

"Don't you try and act smart with me, monster. It's because of you and that strange man that someone could have been killed. In fact we should probably lock you up before we decide what to do with you." He said, before nodding to one of the other men beside him, who then stepped towards Sans, and grabbed both of his arms to pull them behind him, only to begin cuffing him. As much as Sans wanted to struggle and make a fuss, he fought against that urge. It would just make it worse.

"oh come on..." Sans couldn't help but grumble. Seeing this going on, Frisk quickly went to get up from her seat, wanting to defend her husband. She knew he wasn't in the wrong, and none of this was his fault.

"Wait, please don't lock him up." She pleaded politely towards them. "He wasn't trying to hurt anyone. It was all the other person's fault. He was trying to kill us!" Frisk told them, really hoping they would just listen to her. As she was speaking, it wasn't hard to notice the men glancing at each other now and then, like they were debating whether or not to let the skeleton monster go. "If he didn't try to deal with him, we would have both ended up dead." She stated. Because who else was supposed to stop James other than them? The three men sighed, especially the guy who seemed like he was in charge. Sans was uncuffed almost as quickly as he was put in handcuffs.

"I'm just going to say, no more funny business. Or you'll be off this cruise faster than you can say anything to change my mind." He said, and with that being said, the three of them walked off, while Sans rolled his eyes before glancing back towards Frisk. He saw that her arm appeared to be bandaged up now. He frowned.

"are ya okay? how's your arm?" He asked. Frisk smiled towards him.

"I'm okay. It's a bit sore, but it could be worse..." She began to frown herself. "You look upset. Or rather, fed up. It's not your fault he got away." Frisk reassured him, while Sans exhaled. Isn't it? Because of him James now had the possibility of coming back and trying to kill them again. For all they knew he was still on the cruise ship somehow, and was waiting for a good time to strike once again. Just the thought was enough to stress him out, and Frisk noticed that. They were on their honeymoon, and they were supposed to be having fun. Stress won't do. Again, the human sighed. "Come on."

She decided to lightly tug on his sleeve, saying "we should go back to our room" without actually having to say the words. It had been a long day, even if a lot of it had just been them enjoying each other's company. James showing up had clearly put a damper on everything, and that was pretty evident. When reaching their room, Sans was the first to lie down, maybe to recollect his thoughts, whereas Frisk closed the door after them, while staring towards her thoughtful husband for a short moment. She smiled. The last thing she wanted was for them to go to bed in a bad mood, so.

Heading to the bathroom, she first decided to remove any makeup she had decided to put on, making sure her face was completely scrubbed clean. Then, she decided to strip out of her clothing, leaving her in just her bra and underwear. Staring at herself in the mirror, she gave herself a warm smile and let out a confident outtake of breath. In terms of confidence over the last several years, she really had come a long way. For some, it might have been hard to imagine that her 19 year old self, and the version of her now were the same person; sometimes they seemed like completely different people.

Stepping out of the bathroom, she made her way over to the bed, where Sans looked like he was completely off with the fairies. With a small chuckle, she decided to lean towards him, where she gave him a small kiss on the cheekbone. It took a second kiss to actually snap him out of his trance, before he finally glanced towards Frisk. He rose his eyebrows a little. "frisk...?" His cheekbones began to become lightly mantled in cyan blush, when it wasn't very difficult to notice what she must have been up to. She smiled.

"Just relax." She teased, kissing him on the cheekbone once more, but this time she was actually making the effort to move once again, so this time, she was towering over him. It was extremely cute, to see Sans look somewhat surprised; taken aback. Maybe because he was normally used to being the one in her situation. It was never really this way around before. Again, he had almost looked like he was ready to protest, maybe because he wasn't very used to being the submissive one, but she lightly placed a kiss to his mouth, which he couldn't help but sink into. "Let me help you..." She said. She wanted to help him feel better.

So, he gave in, glancing elsewhere in slight embarrassment. It was clear he was trying to hide how embarrassed he was, but the blush across his face told another story. She decided to take this as an opportunity to nibble at the side of his spine, licking and sucking around the bone to evoke some kind of a reaction from him. "nnh~" Clearly, it didn't take her very long to find it. His brow was slightly furrowed, his eyes were closed, his breathing had already become somewhat irregular. It really made her beam, that she must have truly got to him this much. It really showed to her just how badly he adored her, not that she exactly needed any proof.

As she decided to keep teasing upon his spine, her hands wandered to Sans' shirt, which she had began to unbutton and then remove from around his skeletal torso. Thankfully, the skeleton didn't choose to be difficult, in fact, he just let her do it. That was the thing, in these kinds of situations, Sans would likely challenge her, and their roles would go back to what they always were. But for once, he didn't do that. It was different, new, exciting, and adorable coming from Sans. "i love ya, frisk..." Sans decided to speak up.

"I love you too, Sans." Frisk murmured back softly, as she kissed him once more. She could feel his hands gently find purchase upon her hips, and they stayed that way as the two of them lovingly made out, allowing their tongues to move together in a graceful dance. Her heart was beating away so damn fast within her chest, it was unbelievable. She just loved this skeleton like crazy. She felt so lucky to have him.

Taking his collarbone into her mouth, she lightly began to suck on it a little, just like she had done with his spine. She could hear his breath waver a little, as her actions were clearly doing something to him. Especially seeing as he'd let out quiet grunts alongside what she was doing. She had hardly done much, but already he sounded so magnificent. With that thought in mind, she lightly grabbed his shorts only to pull them down, leaving him in just a pair of boxers. Funny how literally minutes ago they were both fully dressed, but Frisk had managed to strip them both down to the point of being almost naked.

"Hold on a second." Frisk whispered, lightly going to kiss him, before she climbed off of him, seeming to go into the corner of the room to where their bags were placed, and she was unzipping one of the small pouches on the bag where you could store smaller items. Of course, they were on their honeymoon, so it was only inevitable they'd become prepared and decide to pack a small box of condoms. Taking one out of the box, she walked back over to Sans, as she placed it to the side. They didn't need it right this second, but it was good to be prepared.

"fuck~. can i just say, ya are really sexy, frisk..." Sans murmured, as she had just been ready to begin kissing at the side of his spine again, but when he said that, she stopped, so she could sit up and look at him. He looked fairly flustered. She was blushing quite a lot herself, she could even hear her own heart hammering in her ears. Hearing Sans say that, it made her let out a small breath she didn't even know she was holding in. She quietly giggled.

Once more, she decided to kiss him, all while she could feel his hands move from her hips to her bra strap, not that she really cared. She happily let him fiddle with it, until it unclasped and fell from her figure. Sans simply tossed it aside, before lightly going to touch his hands to her soft breasts. She quietly moaned. His thumbs decided to trace over each nipple, making her moan a little louder while she shivered. Any time he touched her, it felt so good. It sent electric pulses through her skin, that gave her such pleasurable feelings. It felt amazing.

Having their mouths joined together in another kiss, Frisk decided to grab hold of the last item of clothing from around the skeleton's waist, all while he decided to do the same. Panting lightly, the two of them stared into each other's eyes, as they both knew what they really wanted. Each other. They wanted each other. Reaching for the condom, Frisk made sure that Sans put it on properly, because as much as the two of them enjoyed being parents, running around after two little balls of energy was exhausting enough. The two of them hardly thought they could handle a third one.

"Ahh~" Frisk allowed herself to gently whine, as she began to lower herself down onto the skeleton. She felt his boney hands grip a little tighter onto her hips, as he let out a little groan and shiver of his own.

"fuck frisk~ mmh~" Sans groaned, as he stared up at Frisk, already finding so much pleasure in not even just the way she felt, but also the way she looked. Her face was bright red, while her usually somewhat innocent, soft expression held clear need within it. It really got to him, more than he might want to admit. "move~" He told her. She pouted.

"Mm~ What's the magic word?" She teased, only to see Sans exhale at her question. She almost felt disappointed, because she was sure the skeleton wasn't going to answer her, but she was wrong.

"please~" He decided to say, giving in, just for her. No one else could ever see him this utterly weak. No one else could make him give in without question, unless that person was Frisk. The girl of his dreams. His wife. Sometimes he still didn't understand how she picked him, but that didn't matter. He never wanted to lose her.

With a smile, that's when she began to move her hips, up and down in a slow manor at first, because she didn't want to end up hurting herself. However, Sans didn't seem to complain, as he was grunting with each movement, that was clearly sending waves of pleasure through his bones. But when she was ready for it, she did begin to bounce faster, and that made it feel all the more better. "Ahh~ Sans~!" She had cried, feeling him touch a sensitive area inside of her.

"mm shit~ ah~" Sans groaned in response to her cries, gripping onto her hips a little more, as he was starting to lose himself to what he was feeling. He gave a pleasant hum, deciding to thrust his hips up towards her to meet with her movements, and that caused her to cry out once more. "Oh God, Sans~!" She had said. God, he could hardly handle it when she sounded like that. When she moaned his name in such a lewd manor.

"hah~! keep goin'~ mm that's it~!" Sans encouraged her, deciding to thrust up towards her again with a little more power this time. Her reaction was simply magical, as she moaned in ecstasy, and slightly arched her spine towards him. She did try her best to keep moving her hips, even with the continuous pleasure exploding through her muscles like a cascading firework, causing her thoughts to become all frazzled and fuzzy. There wasn't a lot she could think about, except how good this felt. How good Sans felt.

Kissing the skeleton, Frisk kept up with her movements, while her hands decided to wander, feeling around her husband's ribcage. She could feel him lightly shake beneath her touch, which told her she must have been doing something right. She wanted to please Sans a little more though, because right now, she wasn't sure if she was doing enough. She knew it felt amazing to her, but did it feel amazing to him? Hopefully it would, after this. One of her hands decided to sneak beneath his ribcage, only to brush up against his soul. She heard him gasp out loudly, he even shook a little from just that one small touch. Thankfully, it didn't seem to be a reaction of pain. She gave a small squeeze.

"frisk~!" Sans cried. It sounded like it was a mix of surprise and pleasure, but he at least didn't seem to hate it. In fact, he didn't even tell her to stop, as she decided to keep touching and gently squeezing his soul, all while trying to be careful of it of course. She knew how delicate it was. "oh fuck~!"

"Sans~! I-I think-- Mmh~! Ahh~!" She was struggling to get her words out, but she didn't want to stop. "I'm g-getting close~!" She warned him, as she had been keeping up with the movement of her hips the entire time. Suddenly, Sans pulled her in for another kiss, only to grip her hips, and he seemed to thrust into her again, causing a large moan to escape from her. "Sans~!"

"mm~ m-me too, frisk~! fuck~ cum for me~" He groaned, feeling her beginning to tighten around him, as he could tell she was very likely about to burst. Wanting to try and help her over the edge, he kept a firm hold of her hips and decided to thrust up towards her a couple more times, and with that, she crashed hard over the edge.

"SANS~!" She moaned, as her body twitched and convulsed through the orgasm. The sight and feeling of it all really got to Sans, and it therefore didn't make it very hard for him to follow after her.

"FRISK~!" He groaned loudly, as he came. After that, the two were huge panting messes, as they held each other close. It took a few minutes, but slowly, Frisk lifted herself off of the skeleton, and he was able to throw the condom away. "god... i love ya..."

"I love you too..." Frisk panted in return.

Would it be wrong to think this might have been the highlight of their honeymoon?