[Maturity warning: this chapter is NSFW.]

Sans twitched awake, his eyes blinking at the dim haze of light around him. He was on his back, staring in sleepy confusion up at the ceiling. Beside him Dani moved, her head nuzzling into his shoulder, a hand wrapped gingerly around one of his lower ribs. The skeleton stiffened at the sensation, his body going from drowsy to aware in seconds. His brow bones knitted together as her hand faltered in its grasp before clamping down again. His ribs had always been sensitive, and definitely not in a ticklish sort of way.

Steady shallow breaths indicated that his companion was still asleep, but he wasn't sure how long that would last. There was no way he could stay laying like that forever, especially as the girl unconsciously tormented him. Sans grimaced, face slowly taking on a shade of blue as he moved his free hand to cover his mouth. Desperately he looked to the door, finding it closed the light of day shining in from below. Beside him on the girl's bedside table the alarm clock showed two thiry. Chirst, they had slept in…

The clock had been distracting him when Dani moved again, gripping him tightly as she threw a leg over his. "fuck…" He seethed, body nearly shaking in it's over stimulated agony as she continued to lay there blissfully unaware. Slowly he started to ease his arm out from under her head, managing to do so thanks to the slick texture of his jacket. One down two to go. Propping himself above her Sans easily moved his legs free without so much as a stir, and yet she held him like a vice grip at the ribs. Face completely flushed, he used one hand in an attempt to pry her fingers away. Instead, she used his rib like a handle to pull herself back against him.

Not having time to stop himself the boy groaned, before the noise turned into a whimper, the arm he used to prop himself up shaking at the sensation. Finally the girl woke up, blinking a few times as he froze, praying that she would go back to sleep again.

"Sans..?" Her voice cooed, a bit squeeky from just having been woken up. The skeleton grimaced wondering how he could fake sleep in the half kneeling position he was caught in.

He cleared his throat before answering in an attempt to sound calmer than he was. "yea kiddo, it's just me."

"Where are you going?" She grumbled, trying to get closer to him so they could go back to sleep. Sans' grimace deepened as she pulled at him, his elbow giving out. He plopped beside her again, hearing her giggling at him. Within seconds she was snuggled tightly to his side.

Sweat formed at his brow bone, "nowhere apparently" He attempted to teased, hoping she couldn't sense his nerves like she sensed his magic. Dani hadn't been this cuddly before; was it because she still had one foot in dream land or something? Mercifully her hand lost it's grip on his rib, instead it slithered across his chest as her body trembled with a stretch. He instantly felt like he could breath again, sighing and letting his head fall back into her pillows. A silence stretched between them, Sans being pretty sure that she was falling in and out of sleep as he remained under her, a skeleton body pillow.

The arm that had been pinned under her wrapped over her shoulders, giving the girl a shake. "hey kid, it's already two in the afternoon…" He informed her, more than okay with sleeping the day away; although he doubted that she would feel the same way. Dani grumbled, wiggling around until she was neck deep in the blankets. "you're the one who said undyne could come over today…" He reminded her, surprised at how responsible he was being. Once again the human groaned, although this time she rolled away from him and pulled the blankets up over her head in protest.

Sans propped his head up on a one arm and smirked, watching the lump of human inside the blanket become still. Using his magic, the skeleton pulled the blankets down off the edge of the before tackling her with tickles. Dani had felt the tingle of his magic but could do little to fight him off. One second the blankets were surrounding her in warmth and the next they were gone replaced by a skeleton and his prodding fingers. "don't make me be responsible." He said to her as she thrashed back and forth laughing against her will. "you wouldn't like me when i'm responsible."

Straddling her for a better vantage point, Sans kept up his attacks attempting to ignore how far her shirt had risen up and how her hips bucked under him; reminding himself over and over that he was just trying to get her out of bed. After a few moments of this she caught on to his tickle patterns, grabbing the thumb of his right hand and the pointer finger of his left before yanking them up and away from her bare midriff. He fell forward with a oof, managing to keep from crushing her. His hands struggled for freedom above their heads, winning it before pinning her's down where they had been. The girl was breathing heavily, the remnants of a laugh on her lips as Sans stared down at her motionless and intense.

She realized a few seconds later that his breath was grazing her cheek in a slow, even pattern. She could feel her chest pressing into his, one of his legs between hers and how secure her wrist were held. Right on cue her face turned red, worlds different from how she had appeared only a few short minutes ago in her sleepy daze. Sans was glad to have the normal Dani back, with her fast heartbeat and shy faces. "looks like i won," He started grinning down at her before letting go of her wrist and sitting back on his heels, watching as she lay there catching her breath. Then something else flashed across her face, causing the skeleton to cock his head to the side trying to decipher what it was.

Dani propped herself up with her arms, most of her body still under him. For whatever reason the situation filled her with determination to persevere towards her goals no matter how anxious it made her. She knew her face was flushed, it had been for two days now; but this time she didn't try to hide it. The girl reached towards him, feeling up the front of his jacket till she got a grasp on his collar. The skeleton's smile wavered as she started to pull at him, immediately thinking he was about to be hit for teasing her too much. "hey, what are you doin' kid?"

She wasn't sure exactly how to kiss a skeleton, but she was going to try. Not willing to answer his question for fear of chickening out of her plan, the girl pulled him down until their fore heads touched. Sans braced himself with his hands at either side of her, feeling like he had butterflies trapped in his rib cage as her hand moved from his jacket to his skull. Her hand traveled slowly across the smooth warm planes of his face until she felt his teeth under her thumb. Taking a deep breath she moved her face towards his, pushing a feather light kiss to his mouth.

Dani hadn't known what to expect, assuming that it would be the sensation of kissing teeth, which didn't bother her necessarily. Seconds before she made contact the hum of his magic filled their shared space. The kiss was warm, a tingling sensations dancing across her lips, making her heart beat even faster. She hadn't kissed many people in her life, but the humans who had been so lucky didn't give her half the rush that Sans did. By the time she pulled away Dani was all but breathless, her hand coming away from his face to touch her own lips, feeling the same magical sensation against her fingers.

His spine rattled slightly as the skeleton attempted to compose himself. After a month of admiring her from afar and two days trapped in a relentless, teasing hell Sans had finally made some progress. The quite excitement he felt was making his bones shake, enough that he gripped the bed sheets to keep his arms straight and still. With half lidded eyes Sans watched the way she touched her lips, the hot and bothered expression on her face almost enough to make him shake apart. Grinning wolfishly the skeleton leaned towards her until he could kiss her again. The girl's fingers moved from her lips to the front of his jacket as she felt him approaching.

Sans kept leaning in until the girl gave up on sitting and fell onto her back. On all fours above the human, he grinned, parting his teeth so his blue tongue could slip past. She shivered at the familiar sensation of his magic, feeling the skeleton staring at her from above. The girl's face twisted in an embarrassed pout as he kept looking down on her, glad that she couldn't see how positively predatory he'd become. With an easy bend of the elbow Sans lowered himself towards her, feeling the girl's body tense with anticipation as he approached. Being sure to keep one hand stationary to support himself he brought the other to her midriff easily sliding his boney fingers under her shirt.

Tracing the same path he had followed the other day, Sans went about his prodding with more intent. His fingertips pressed more demandingly into her flesh, hand squeezing at her side with a needy sort of pressure. Each of his movements was rewarded with the girl's rising heartbeat, the increase of her body temperature and a myriad of faces mirroring his own intentions. The sound of her labored breathing cheered him on.

Tongue pressed to the point of his canine fang, Sans leaned in closer as his hand traveled dangerously high up the girl's body. Dani shuddered under his weight, holding her breath as she readied herself for what was coming next. She was to hot to think anymore, only able to focus on what he was doing and where he was doing it. Her legs felt like jello as one hand clung desperately to the bed sheets and the other to the back of his jacket. She was very obviously shaking, brows knitted together and her eyes closed as the girl tried to keep herself from slipping off into the dark and losing herself in the sensation.

Dani whimpered as the skeleton's tongue slithered from her collarbone up her neck at a leisurely pace. Before he could get to her ear she was whining and wiggling under him, her legs pressed together tightly with one his between them. He gave her earlobe and affectionate nibble, going out of his way to pin her flesh between his tongue and one of his fang-like canine teeth. At this the human's mouth fell open, an agonized "Oh," escaping that made the skeleton smile lewdly. Sans put his teeth against her neck, lapping at her hot flesh with his tongue before applying a bit of pressure to the half hearted bite. He was rewarded with another moan, the sound enough to rouse an equally desperate growl from him.

Sans licked over the small marks his teeth left on her neck. The human under him rocked her hips against his leg whimpering, pulling even harder at his jacket. He moved to press his knee harder against her. Dani arched her back at the pressure, her head rolling back, biting her lip. Sans watched her squirm, that arch to her back, the way her thighs quivered and the maddening way she bit her lip; he marveled at his own self control as she writhed with abandon at every sensation.

The skeleton had his hand posed at the line her bra made with her skin fingering the space to see if she'd put up any resistance. Instead of protesting she moved her hand from it's death grip on the sheets, replacing it to his cheek. She thought she'd go crazy if he kept teasing her neck; honestly concerned that her brain would never go back to normal if he did. Dani angled her shoulders to be more parallel with his. "Sans…" His name was barely discernable through the breathy whimper that accompanied it. The skeleton felt like he'd been struck with lightning hearing her say his name like that. He moved to meet her lips kissing her once before his tongue slithered between her teeth eager to explore the hot moist cave of her mouth. Her following moan was muffled, her arm moving around his neck pulling him even closer.

Sans worked her change in position to his benefit, fingers sliding around her back to unhook her bra. His hand spread across her open back reveling in how soft and smooth flesh felt. With painstaking slowness his hand traveled towards her chest, using his weight so she would lay flat on her back again.

Dani breathed as Sans pulled back, the pause allowing some of the fog in her head to clear. Her whole body felt like it was on fire, pins and needles of adrenaline coursing through her veins. Her heart thundered in her chest, painfully aware of every inch of her skin that was in contact with him. He was still for a moment before hooking his thumb under her shirt, moving the fabric up with ease. The girl held her breath as he moved her shirt up over her breasts before continuing up. She helped, moving her arms to allow the expulsion of the fabric. Sans on the other hand didn't intend to take it all the way off, stopping at her wrists to gather the shirt in his hand and hold her arms still.

His free hand cupped her breast as he stared down at her with a blue halo of intensity flaring up in his left eye; it cast an eerie glow across her skin. She gasped at the touch, back arching, filling his hand with more of her sensitive mound. His thumb moved to circle the pale pink flesh of her nipple, feeling the girl shake under him from the sensation. "Oh god…" She sighed, voice shaking as much as her legs were.

Sans grinned viciously lowering his face to nuzzle between her breasts. "your so fuckin' soft." He purred into the rising and falling of her chest, his hand kneading into her, thumb relentlessly circling. Lifting his head, the skeleton let his tongue roam, tasting her as she groaned below him. Her wrists pulled at their restraints helplessly, his tongue flicking over her nipple. Dani threw her head back with a grunt, her mouth falling open to allow for several more pants after.

Sans' head stilled, her nipple between his teeth as a knock came to the door. His eyes narrowed as the left one flared again, Dani freezing below him, a moan choked in her throat. "HUMAN, IT'S ALREADY THREE IN THE AFTERNOON, ARE YOU OKAY?"

The girl was silent, heart pounding, hoping if she didn't say anything he'd go back downstairs. "you better answer, unless you want him walking in here right now." Sans said, before lapping hungrily at her breast, grinning as she shivered. This was probably the end of their exploration for now, Sans realized with annoyance, but he could keep tormenting her for a little longer.

"I-I'm, ngh… I'm fine! Just sleeping in-uh-uh a little." She called, trying to get her wrist free so she could shove Sans away. He kept feeling her, licking, biting, pinching…

It took Papyrus a moment to answer, Dani biting roughly at her lip to keep from making anymore noise than she already had. "IS IT STILL OKAY FOR UNDYNE TO STOP BY FOR DINNER? I TOLD HER TO BE HERE BY FOUR YESTERDAY BUT I CAN CANCEL."

"No, i-it's fine Pap, I'll be down in- a little bit."

"EXCELLENT! DON'T FALL BACK ASLEEP HUMAN OR YOU WON'T BE UP IN TIME." With that Papyrus walked back towards the steps, his footsteps leading away until they were gone.

Sans lifted his head. "we better get up kiddo…" He said, hoping not to sound as devastated as he was. Looking down on her, the skeleton tried to lock her image into his mind, flushed face and all. The girl pouted, sighing in a small attempt to calm herself down. Sans released her wrists and moved to sit beside her, Dani taking far longer to get up.