Local Ambush Predator Likes To Ambush Partner Carnally.
I think Sam can't help himself. Dream is like, at the kitchen counter making himself a sandwich, and Sam comes up behind him and fondles him, kisses him, pulls his trousers down just enough that he can't be impeded from thrusting deep inside his beloved.
And Dream is surprised and amused and asking "Sam? What are you doing?" But makes no move to prevent the gentle manhandling. His husband is bold today, what a treat. He let's Sam grab his hips and fuck into him hard and frenzied, and enjoys himself thoroughly. Even deliberately squeezes down on his love's cock and moan, "too big, Sammy, you're too big, I can't-!" Like he hasn't had Sam inside him a hundred times before.
He knows what his Sammy likes.
Normally he might even be more theatrical about it, play up the dubious consent and how Helpless He Is to his beloved husband, but Sam isn't pulling anything back. He can't even do more than moan and push back into every thrust.
Sam is insane. He needs to fill Dream up as soon as physically possible. So he drives himself insane to Dream's breathy noises of "ah ah ah-!" and doesn't even soften when he cums the first time. He needs to fuck him again, again and again, until his knot swells and Dream has been thoroughly bred
Sam can't finish until Dream cums though. Those are the Rules he's made in his head. So he grips Dreams leaking cock and jerks him off, groaning at the way Dream cries out and starts fucking himself on Sam with stuttering hips.
Dream can't focus on anything but reaching his climax. He needs it. And his loyal husband is being so good helping him. He tries to tease Sam's knot as it catches on his hole, over and over, but then Sam is rubbing the tip of Dream's cock and he's coming, collapsing on the counter as Sam fucks him through it and pushes his knot fully inside him.
Sam's eyes nearly roll back as he feels Dreams walls tight around him, urging him to spill over and give his husband all his love. He has to, he has to. It felt too good not to. He fucks Dream through his own orgasm, trying to push his knot impossibly deeper.
Filling Dream with the proof of his love.
When Dream recovers, he makes a show of clawing the counter, pretending to try and escape from underneath Sam, get away from his cock. His Sammy purrs loudly, rocking his hips a little deeper. Proof that he caught his prey.
Dream's cute little predator. Sam is preening and thinking he did such a good job while Dream is petting him fondly.