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Dick is shaking, trembling really. He’s not supporting his weight at all anymore; the nest of pillows on their bed is doing the work for him. Damian had bought a large pregnancy pillow for the endeavor and Dick had laughed, but now the damn thing is keeping his hips up and his distended stomach from pressing against the bed.
He’s not pregnant, to be clear. It’s physically impossible for a biologically male alpha to get pregnant, but that won’t stop his mate from trying. As a prime alpha, Damian gets even more insane during his rut than normal alphas. Sure, Dick is more than familiar with wanting to put your cock in everything that moves and all the hormones and chemicals flooding your brain making you want to get whatever that thing is pregnant. But Dick also knows that in his own ruts there’s an undercurrent of logic, something in his brain that told him he couldn’t get his last beta male partner pregnant, something in his brain that made him bend over for Kori rather than wanting to get her fat with pups.
Of course maybe Dick is the outlier.
After all, what kind of alpha lets this sort of thing happen? What kind of alpha likes it?
His hips are tilted up, held there by a padded breeding bar and several pillows for his comfort. This is the angle that would definitely get someone pregnant if they have a womb, but Dick doesn’t have that. He won’t get fat with pups for Damian, but during Damian’s ruts he allows this, allows the younger man to get him fat with as many loads of prime alpha cum as Damian can pump him with before his rut breaks. He’s at ten loads in as many hours right now, and to be honest it’s starting to hurt, starting to strain his back and pull too hard at the taut skin of his abdomen. Maybe if he had a stitch of fat on anything other than his damn ass it wouldn’t be so taxing.
He’s plugged tight with a fake knot right now, his mate fussing over him like he really is some wanton omega. Damian is trying to ply him with cool water and applesauce packets because he knows it is all Dick will take in the throes of Damian’s rut. It’s all he can fit inside him really, most of the space in his core taken up by the cum Damian has pumped inside of him.
“Can’t,” Dick murmurs, voice soft and strained, when Damian reaches for another applesauce. “Too full.”
Damian’s eyes are wild, no longer green but a black that takes up too much of his gaze. The arousal never stops, even when his erection goes down — not that his erection is flagging right now, considering the way that it’s already plumping up again between dark thighs at the sound of Dick’s wrecked voice. Damian stops reaching for the basket of supplies on their bedside and pushes up into a kneel, kissing Dick’s mouth hungrily for a long moment before he pulls back to clamber onto the bed.
Sometimes Damian is so far gone into his rut that he doesn’t even speak, and sometimes — like this time — he’s reduced to simple sentences about how much he loves Dick and how he’s going to breed him up and get him pregnant with a new generation of Waynes. “Ya Gameel.”
Oh beautiful, the back of Dick’s mind translates as fingers circle his stretched out hole. Those fingers disappear after a moment of worship, prodding the mechanism that makes the false knot deflate. Damian carefully pulls it free, the angle of Dick’s hips not allowing any of his precious breeding fluid to escape.
“It will take this time, I’m sure,” Damian says. There’s a tone in his voice that speaks for how far gone he is, a lack of emotion that betrays his single-minded focus on getting his mate pregnant.
The head of Damian’s cock slides inside easily, followed by the thick girth of him as he buries himself to the hilt inside Dick’s overworked, too-lax form. He doesn’t even need lube anymore with how full of his cum the older man is, and Dick has to tighten his fingers in the pillows under him as he feels all the fluid inside him shift with Damian’s thrusts. He could protest, raise a fuss about the ache under his skin and the overfilled feeling that’s been resting inside him since the sixth time Damian railed him into the sheets.
Damian would pull out too, replace the false knot and get himself off between Dick’s thighs, trying to convince his hindbrain that he’s pumping his mate full of cum. Damian has always held Dick’s comfort over his own rut needs, and wouldn’t keep going if Dick asked him not to. It’s just… Dick doesn’t want to ask him to stop.
This is the most he’s ever taken and he probably will only get two or three more loads — counting this one — before Damian’s rut breaks and the younger alpha hauls him off to the bathroom to empty him out and clean him up. There will be a bubble bath afterwards, with epsom salts and one of Damian’s carefully curated playlists put on low for Dick to relax to while Damian himself cleans up the bedroom. This time Dick is determined to take every bit, to lay with Damian for a while afterwards and let the younger man cradle his fattened up stomach, and just let the younger man bask in the fantasy.
Because he knows Damian thinks about it outside his ruts.
Right now, while he is hammering into Dick and murmuring about getting him fat with a litter and breeding him up, it is obvious. The signs are there when he isn’t doing that though. The way he sometimes buries his face in Dick’s throat and cuts his stream of speech off. The way he slides his hand over Dick’s stomach to try and get a feel of himself when Dick is bent in certain positions. The way he knots outside of rut when there are no omega pheromones around to trigger it.
Damian wants to breed his alpha partner up so bad it makes him look stupid.
“Fill up your pretty womb,” Damian growls into the meat of Dick’s shoulder between a litany of Arabic that Dick can’t understand on a normal day. It makes Dick clench around him, gasping in pain-pleasure at the pressure the twitch puts on his over-full stomach.
Dick wants to let his prime alpha mate breed him so bad it makes him look insane.
His own member is drooling into the sheets and pillows stacked beneath them, untouched and overworked. He shouldn’t be able to cum so many times when he isn’t in his own rut but Damian keeps fucking orgasms out of him like that will make it more likely the baby will take. Dick moans pathetically at the thought, burying his face into the pillow he’s been drooling and crying into.
Damian’s nails are digging into his hips, his fangs skimming the curve of Dick’s shoulders as he speaks filth in three languages into the musky air of the bedroom. God forbid they ever spend Damian’s rut at the manor, everyone will know what they get up to, will know how bad Damian wants to pup his older alpha brother. Dick would never hear the end of it, of letting Damian do this to him, of loving what Damian is doing to him.
Damian slides his palm over the curve of Dick’s belly, slow and gentle. He doesn’t linger there, hand continuing down to wrap around Dick’s cock. He jerks in time with his own thrusts and Dick can feel the tell-tale pressure of Damian’s knot starting to build, every thrust pressing and pulling at his abused rim. He’ll get Damian’s eleventh load soon and it makes something in him burn. Before now he’s always tapped out before they got to double digits, and he can’t help but toss that number around in his head. If he were an omega, he’d be pregnant like five times over with a normal alpha and Damian is a prime alpha.
Dick spills over, his cum practically oozing out of him as Damian’s knot locks inside him.
“So good, my pretty mate,” Damian croons, hands sliding over Dick’s quivering stomach as he fills it with another hot load of cum.
Dick’s vision is spotting at the edges from his orgasm and he has to suck in a breath and dig his fingers into his palms to keep from following that blackness to sleep. He knows Damian won’t keep going if he passes out, and Dick refuses to tap out.