Joncest monstersex. Send post.
Future!Jon wrapping past!Jon up with their arms and tail, keeping him pinned and helpless while they fuck him ruthlessly. Tongue-fucking him with something long and limber that licks at all his sensitive spots just right. Past!Jon who can slide his whole fist inside of their cunt with relative ease. Who has to coax their long (barbed?) cock from its sheath before he can take it into his mouth or ass or cunt. Future!Jon pinning him beneath their weight and using him until they’re satisfied. Who has heats that past!Jon can barely keep up with (that maybe Elias can help with…). Past!Jon is always a little afraid his future self will kill and eat him. Will dig out his every secret with claws and teeth. Who shudders with equal fear and arousal whenever those claws prick his soft, vulnerable stomach, those teeth settle too close to his throat. Fascinated and terrified by every deadly, monstrous quality. Who longs for them, in a way he can’t explain but understands far too well anyway.
Oh and past!Jon would be Extremely Normal if his future self got him pregnant. Maybe during their heat.
And past!Jon never really considered it a possibility. Neither of them did. Never thought they could get someone else pregnant. They don’t think of it at all until past!Jon starts showing symptoms.
He probably tries to hide it, I think. Maybe even succeeds for a few weeks. And he’s so terrified of the Thing growing inside of him but far too curious to ever get rid of it.
It’ll be a shitshow, of course (as if their whole… relationship wasn’t messy enough already). Especially if Elias got future!Jon pregnant too. Just an absolute disaster. But really, that’s what makes it fun <3.