DETERMINED Prince

Story by Gildedtongue on SoFurry

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#6 of Commissions

Continuing on from the last Undertale story, little Simon finds himself going from the queen of the underground, to the heir!

As the Undertale world is made up of a multiverse of possibilities, this one is one of those universes where the characters in this story are all 18+

Simon belongs to his player.

Undertale and related items were made by the Annoying Dog: Toby Fox.


Toriel stretched out on the bed. The time of fun with that mouse was over, she was a little embarrassed that she accidentally swallowed him, but, then again, he was the one that decided to dash between her legs. Anything that happened after that was certainly instigated by the rodent. Another yawn came from the momma goat, adjusting herself on the bed. She kicked of the covers at this point, feeling too warm to have them on in the middle of the night before slowly falling back asleep.

The creaking of the floorboards didn't wake her up as Asriel made his way into the hallway, opening up the door and leering in. The monster prince taking in a deep breath, smelling his mother's scent and juices in the air, making his night-shirt tent out far before him. Asriel's nose picked up on his mother's scent, taking in her recent orgasms as his eager cock throbbed heavily. Lifting up his green and yellow striped shirt, that eager pink rod was unveiled, dripping preseed all over the ground as he crawled up onto the bed.

It was a good thing that Toriel can be a heavy sleeper, especially after a number of orgasms. She slowly snored, one arm resting over her chubby belly as the other rest on the pillow next to her face. Asriel stared at the heavy breasts he nursed from, his tongue flicking along the fangs in his mouth, moving to lift up a heavy thing, bringing the pink nub into his mouth. The wide areola crinkled around his muzzle as he suckled fruitlessly.

Holding his cock in his hand, and keeping his eyes closed, Asriel slowly slipped himself into his mother, gasping softly. It was positively soaking inside of her. Warm, hot and wet. He had been sneaking into her room for over a year now, and this was the juiciest he's ever found his mother. He didn't have to hold back or go slowly, pushing more and more within her quiet, snoozing form.

Simon had just finally made his way out of Toriel's womb, plopping into her vaginal cavern when the thing that was giving her an orgasm came into view. The pink, bulbous tip of that goatcock slapped the rat's face slightly in its full glory. Simon was knocked on his ass momentarily, shuddering a little as he watched the pink worm pistoning in and out.

He knew he couldn't stick around Toriel, she might swallow him up again, and he wasn't too interested in going through that dungeon once again. Though, that cock was offering a perfect way out of this place. With a running leap, Simon pounced upon the spongy crown of the eager dick. All he'd have to do is keep hold of it until it withdrew and he'd be free from the motherly grasp of the Boss Monster.

There was a rather odd feeling on the tip of Asriel's cock. A fuzzy squeezing that kneaded his crown as the prince panted. Perhaps a side effect of getting his mother's arousal so high? For the moment, he didn't seem to mind it too much, putting extra effort into his thrusts, panting loudly as he watched his slumbering mother's body ripple with his lustful motions.

Simon squeaked again, still getting pushed and pulled all around. The sensation and the smell made him groan in pleasure as his member slipped out of his sheath. The heart shaped glow patterns getting brighter as he groaned, frotting against the tip of the needy Boss Monster's glans.

He was getting completely soaked in preseed from the weeping cockhead, making him slip slightly. Simon did his best to keep locked onto the cock that's poking deep within Toriel, trying not to get shook loose. The mouse's erection kept grinding along that crown before it lined up with the leaking eye.

Simon's eyes went wide as he found himself in a wet, warm hole in the cock, grunting lustfully as he started to fuck it rapidly. His balls swaying and slapping at the crown of the Goatmom invader and his tail stuck out straight.

Asriel gasped, feeling something shove into his pisshole. It felt weird, really weird, but at the same time oh so good. The horny goat whines and held back a bleat as he kept moving in his dozing mother, listening to her steady snoring before he gave one final thrust, holding absolutely still.

The sticky goat's seed gushed out, painting inside of his momma as Asriel swallowed his wrist to try and not make too much noise, though the orgasms and the midnight interruption put Toriel into a much, much deeper sleep, not even noticing the adventure going on between her legs.

As his cock started to soften, it pulled into Asriel's sheath, slipping out of his mother's warm cove and into the air for a moment before nestling into the pouch above his firm little coinpurse of a scrotum. Asriel gave a big yawn, stumbling off of his mother's bed and made his way back to his room.

Unknown to the prince, Simon still held onto his wet cockhead and squeaked loudly as he was pulled out of one goat, and into another. While Toriel's yonic cavern was very muscular, there was a bit of roominess in there. Stuck in the prince's phallic sheath, there was no roominess. The mouse's body made a little perfect outline and indentation on the outside of that white fuzzy sheath. It jostled and wobbled with each step as Asriel scratched his belly.

Simon squeaked quietly, tired from the running, from the fucking, and from the fucking running. His tail stuck out of Asriel's sheath slightly before he felt the fanged goat climb into bed, nestling in for the night. Perhaps Simon could get a little respite. He had enough adventure for quite a long time, and he'd be happy to find his little hole in the wall, and forget about the stale cheese, and the pies, and the Boss's nethers, and the Boss's penises.

Simon tried turning around, though the interior of the sheath was wet, slimy and gooey with Asriel's seed and what bits of Toriel's juices that were pulled back by his cock. The mouse grunted, struggling in the tight confines as he reached out, just barely touching the very bottom of Asriel's sheath where it attached to his penis, hoping to get enough push to get him out a little.

As Asriel slept, he giggled between snores, feeling the wet, fuzzy thing press against his cock. His dreams cycling around his last waking actions, how his mother laid there, fast asleep, unable to stop her son from touching her, groping her, mating her. His cock stirred, pressing Simon against the walls of the sheath, but he couldn't get out. He was well and truly stuck in there.

Simon trembled, falling asleep in exhaustion again, letting the scent of Asriel's maleness fill up his brain, leaving no room for anything else. In the morning, he'll have to figure out an escape plan, or at the very least, the Boss Monster he's currently occupying the dickhome of will try to evict him. If that was the case, he'd have to have plenty of rest to scurry away.

A tugging at his tail roused up Simon. He couldn't have been asleep long, he was still too exhausted. Letting fate take its toll, he gasped as he was pulled out from Asriel's sheath with a loud, wet, slimy pop, leaving him dangling in the air.

It was not the goat prince that had freed him. It was something that Simon had only heard stories of; whispered by mothers trying to quiet their unruly children. He thought them a myth, something King Asgore would peddle to keep the people in line. But it wasn't a myth. It was real.

Simon's little green eyes stared into the dark, sleepy looking eyes of the most dangerous thing in all of creation.

The eyes of the Human.