Monster future!Jon in heat. Hiding in the tunnels, feeling both stripped bare vulnerable and like it has a hair-trigger temper. Needs to breed and be bred. Past!Jon looking for it, finding it, this huge beautiful monster and it’s so wet and so hard and its looking at him like it hasn’t decided how it wants to devour him. He’s terrified. He’s soaking wet. Gaze slipping between its piercing, staring eyes and it’s erect cock, swollen at the base where the knot will form. He could probably escape, if he backed away slowly. Let himself slip back into the darkness slowly and calmly. Instead he turns, and he runs.
Elias who is also Very aroused about the idea of fucking a monster through its heat. Having it wet and desperate for breeding underneath him. Who is also, perhaps, a little bit worried that this terrifying future version of Jon is going to fuck his archivist to death (concept he is a normal amount of horny for). And who above all else would really like to observe future!Jon with all its limbs (plus tail) coiled around past!Jon to keep him in place while it ruthlessly pounds him, cum and slick dripping from his swollen cunt, womb already filled with its seed and making him look like he’s well into the first trimester already…
And of course he ends up sharing monster!Jon. Somebody needs to use its cunt, and clearly past!Jon is too out of it to do anything but take his future self’s cock. Need future!Jon knotted inside past!Jon. Panting and fucked out, eyes a little glassy and mouth half-open as it feels Elias’ hard cock bumping at its folds, sinking inside with no prep (but it didn’t need any, did it? Cunt wet and open and welcoming, body ready for breeding…). Every thrust just hard enough to jostle it, have both Jon’s gasping and moaning from the sensation…..
I think past!Jon should get some nice good mindbreak out of this btw. Sex with his future self is always intense but this is…. he’s still afraid. Not totally sure if he wants this, if he’ll be able to say no, later, when his monstrous future self is fucking him into the ground.
It’s an overwhelming assault on his senses, every thought consumed by the awareness of the huge cock pushing inside him, the flared base (is that normal? He’s never seen anything like that before…) how full and wet he is. How it feels to be pinned and utterly helpless beneath something so huge and dangerous. Every powerful, deep thrust crushes him against the floor of the archives, hits something deep and sensitive that sends his mind spinning from the sheer pleasure of it. He tries gripping their chiton, there shaggy mane, but soon he doesn’t have the strength to do even that, can only lie there and take it. His cock hasn’t even been touched but he’s so so close and he’s moaning and pleading and he isn’t even aware if that, just knows that he feels so good and he’s so close and please-
He cums so hard he nearly blacks out, cunt locking down on the cock inside of him in a vice grip and he isn’t sure what’s pleasure and what’s pain. Gushes over the cock buried inside him. And it keeps going. He’s so overstimulated and it feels good and it hurts and he doesn’t understand and he tries to gasp out “wait, stop” but he can’t and the only thing that comes out of his mouth is a whorish moan. He really can’t do anything to stop this or change it. He has no control over the situation whatsoever and the thought makes him cum again, wailing and shuddering and trembling beneath the massive claws pinning him in place. Above him his future self is snarling and growling in pleasure as it chases its release. Past!Jon comes back to himself only just barely enough to realize that the cock splitting him open is getting bigger, somehow, and then with a sharp cry future!Jon hilts itself deep inside, knot inflating to tie them together, pumping past!Jon so full of its load that his stomach becomes slightly swollen. Naturally he cums again. No idea what’s going on but that he’s been stretched to his limits and there’s something hot and heavy and bulging pressing against his sensitive inner walls and he’s clenching and rubbing on it and cumming and cumming and cumming and cumming.
He blacks out for just long enough for future!Jon to be ready for another round. Wakes up impaled, barbs scraping along his walls, body responding with pleasure even while he was unconscious and so even now that he’s awake again he’s still overwhelmed, brain empty and cunt stuffed full. Lying there as his body trembles and shakes and cums again. Fucked utterly stupid, completely unaware of anything beyond the cock inside of him and the sharp claws piercing his skin.