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Stephen Strange is everything Tony could possibly want in an omega. Unfortunately, despite the fact that he is obviously attracted to Tony, he’s also very firmly of the opinion that romance is a distraction from his calling as a sorcerer. Tony also suspects that he’s carrying a bit of a torch for a past alpha. Regardless, all of Tony’s flirting and arguing hasn’t made a dent in Stephen’s resistance.
Fortunately, words are not the only tool at Tony’s disposal.
The on-label use for Equilivadone is to stabilize the heat cycle for omegas with certain hormone deficiencies, but it also has an off-label use, one that has made it into a controlled substance: When a healthy omega is dosed with Equilivadone, it triggers an intense heat and spikes their bonding hormones. Not enough to fully form a mating bond, but enough that omegas who share an Equilivadone-induced heat with an alpha become so sensitized to that alpha’s hormones that they are effectively incapable of refusing that alpha, even after the heat is over. Affected omegas seem aware that their attitude has changed, but it doesn’t bother them. It’s perfect.
For Tony, getting a hold of some Equilivadone is trivial. Dosing Stephen is a little harder, given that it’s an injection, but Tony finally gets his chance after an Avengers event when Stephen—with some discreet encouragement—has a little too much to drink and passes out in Tony’s guest room.
Tony waits until he’s slept long enough for the alcohol to be mostly out of his system, then gives him the shot and sits on the edge of the bed, waiting. Stephen slowly grows flushed as his body temperature rises. He kicks off the sheets, and a wave of thick omega scent rises from the bed. Tony breathes it in deeply, his cock stirring. He resists the urge to wake Stephen; the deeper he is in the heat when he wakes, the better.
By the time his eyelids start fluttering, Stephen’s thighs are slick, his sleep clothes are sweat damp, and he’s in full heat. Tony reaches out and shakes his shoulder. “Stephen, are you okay?” he asks. “FRIDAY said you were feverish.”
Stephen’s eyes open, already hazy with the urgency of heat. “Tony,” he moans.
Tony leans in and takes a sharp breath, as if just realizing. “Stephen,” he says. “Your heat—”
“I’m not due for weeks,” Stephen groans, but he’s already squirming out of his damp clothes. Probably because he’s uncomfortable, not because he’s looking to get fucked, but it works.
“Due or not, you’re definitely in heat. And it looks like a bad one.” Tony stands and strips out of his clothing. His cock, fully hard, bobs in front of him.
Stephen shoots him a confused look, his eyes catching on Tony’s cock despite himself. “I spend heats alone,” he says hoarsely, but he’s still looking at Tony’s dick.
“This heat is way too intense to risk alone,” Tony insists, climbing onto the bed.
“I– I can’t–” Stephen gasps, but he doesn’t struggle when Tony pushes between his thighs and lifts his hips. His hole is gaping and shiny with slick, twitching with the need to be filled. Tony licks his lips. Maybe… He pushes three fingers together into Stephen’s hole. Stephen moans loudly, liquid almost gushing out of him, his body relaxing around Tony’s hand with remarkable speed. Fuck, that might be all the prep he needs.
“Relax and let me give you what you need,” Tony says, pulling his hand free.
“Tony,” Stephen pants, and it might be a protest, but it doesn’t matter.
Tony pushes forward and the head of his cock slips into Stephen’s hot hole. “Fuck, no one’s ever taken me so easily,” Tony moans. His cock is large even for an alpha, but Stephen’s body takes him greedily, practically sucking him in. Tony’s entire length is buried right to the half-swollen knot in seconds. When he drags his gaze away from the sight, Tony sees that Stephen is panting open-mouthed, his eyes fully glazed over with need now. “That’s good, baby, that’s perfect.”
“Alpha,” Stephen says, and Tony’s thrust is completely involuntary. He follows it up with another, driving hard into Stephen, who keens, his small omega cock standing straight up and leaking clear fluid.
“Yeah, that’s what you needed,” Tony says, fucking deeper into Stephen. “It feels good, doesn’t it, baby?”
“So good,” Stephen moans.
Tony tries to go harder, but Stephen’s sweat-slick hips and thighs slip under his hands. “Fuck,” Tony groans. He pulls out, and Stephen sobs. “Present for me, omega,” Tony orders.
Stephen scrambles onto his knees and elbows, legs spread wide. Tony drives back into his gaping hole roughly and Stephen cries out in pleasure. It’s much easier to mount him in this position, and Tony puts his back into it, pounding Stephen’s wet hole vigorously. God, it’s incredible, better than any heat Tony has ever shared before. He loses himself in it, the clutch of Stephen’s body and the sweet moans and cries, the thick scent of heat and sex filling the room, the slapping sound of their bodies meeting.
Tony’s almost sorry when his knot starts to throb urgently, but it’s not like this will be the only one. “Ready for my knot?” he gasps. Stephen doesn’t answer, beyond words, but when Tony thrusts in hard, driving his massive knot into Stephen’s glistening rim, he wails and bucks back into the thrust. Tony’s hole pops inside and Stephen’s body clamps down on it hard. Both of them tip over into orgasm, bodies synced up for the heat. Tony moans helplessly as his cock spits rope after rope of come into Stephen, encouraged by the rhythmic clenching of Stephen’s hole.
It’s a long time, much longer than usual, before the clenching subsides and Tony can ease them down onto the bed, spooned close together to accommodate the knot. He nuzzles Stephen’s jawline gently from behind. “How are you doing, baby?”
“Good,” Stephen says muzzily.
“I’m going to stay with you,” Tony says. “I’m going to knot you as many times as I can, and it’s going to feel so good, I promise.” Stephen makes a soft noise of assent, but Tony wants to hear it. “Does that sound good, Stephen? Me fucking you through this heat? And after, too?”
And even though Tony has only knotted him once so far, Stephen murmurs, “Sounds good, Tony.”
Tony settles, pleased. This couldn’t have gone better.