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The first thing Matt registers when he wakes up is something big and heavy sitting on top of him. He thinks, oh, the dog probably climbed into the bed again. Then he remembers the last time he had a dog was when he was eight.
The second thing he registers is that said something is very insistently grinding itself up and down on his dick.
"Uh," he says, when opening his eyes reveals Mello hovering above him like a very sexy sleep paralysis demon. "Early heat?"
"Shut up," Mello snarls loudly, with a deep, guttural growl that Matt wishes he could also do, because it sounds cool as fuck. It's still way too dark for him to see much and his sight isn't adjusted yet, but Mello's eyes catch on whatever light still seeps through the blinds and glint like two full moons, golden and bright. He would look terrifying if not for... well alright, he does look terrifying whether or not Matt is used to it by now.
"Hello to you too," he says, still a bit groggy, and Mello's response is to sink all the way down onto his now definitely fully hard dick. Matt makes a noise much too similar to a squeaky toy for his liking. Mello seems to like it though, because he makes another deep growling sound and continues moving. It's enough for Matt to wake up properly.
He untangles his hands from under the duvet that was hastily tugged to the side and places them on his boyfriend's waist. Mello sighs at that happily. His skin is really hot to the touch, and he smells so horny, Matt is sort of bewildered he hadn't noticed it before they went to sleep. Then again, Mello's heats have always come really suddenly.
Mello is usually perfectly content to take care of everything himself, so Matt doesn't have to do much more than just lay there, which he is also absolutely fine with. Mello is so hot and wet his slick is now smearing on Matt's thigh. It's kind of hard to keep his hips still, but he gets growled at every time he tries to move to match the rhythm.
Mello first keeps his hands on Matt's arms, then rests them on his chest and scratches lightly. He looks like a giant feral cat, panting loudly, all sweaty and the tiniest bit desperate. If he had a tail he'd be swinging it around, but since he has none, he has to make do with his freaky omega eyes and charming personality. He really is a sight to behold, though if Matt tried to voice this thought now, he'd probably get his dick bit off for speaking out of turn. Omegas in heat get crazy about the stupidest shit like that. Or maybe Mello is just insane. Matt wouldn't know the difference, not like he has anything to compare to.
Mello growls a happy growl on a particularly hard thrust and Matt shudders. He's pretty close already. When he opens his eyes again because Mello has stopped moving, he sees him leaning down, face just a few inches from Matt's. He has a dreamy, sickly sweet thought that hey, they're gonna kiss, before Mello leans even further and sinks his teeth into his shoulder.
Fuck, it hurts.
He knows that all the stuff about omega's teeth getting sharper during heat is pseudoscientific bullshit, but fuck, it's not hard to believe it like that.
He blacks out for a second. He thinks he might have just came because his head is swimming in the nice tired feeling, but Mello is still latched onto him, little face knives trying to bite off a chunk of his meat. No one does this shit like this, Matt's pretty sure, or else a third of the population would end up with monthly hospital visits. Mello's tongue is slick and hot when he presses it into the skin between his teeth.
"You fuck," Matt hisses painfully and tugs him off by the hair, not at all kindly. Mello does not let go easily and when Matt manages to tear him away, his lips are clearly smeared with blood, and he's laughing, those glowing eyes full of evil sadistic glee. In a quick, sudden movement, Matt brings him down and retaliates. The way Mello squeaks in pain is surely way more embarrassing than whatever noise Matt had let out. He tries to wiggle out of Matt's grip but still ends up with a deep teethmark, albeit not one that's bleeding like Matt's does.
Mello still laughs when Matt lets him go, even if he was squirming uncomfortably the entire time.
"You're such an asshole," Matt complains, mad about his ruined orgasm and also really tired all of a sudden. "That fucking hurt."
"Shush," Mello says, still smiling, "go to sleep." He's still straddling him, and he rests his head awkwardly on Matt's chest, and he's heavy. Matt tries to shove him off to the side and discovers they are tied together now. Great. Nothing better than a sweaty boyfriend trying to get you to bleed to death. Blood never washes out of the sheets properly. Mello hits him over the head for trying to throw him off and settles back down. He doesn't bite again, at least.
Matt sighs and relents. He grabs at the duvet and blindly tries to cover them both for a full minute, without much input from Mello, until it sort of works. He scratches Mello's hair until he hears a faint purr. And, well.
There are worse ways to spend a night, alright.