The sound Sam makes is feral, a high pitched mewl that comes from deep in his throat as Bucky forced his legs apart and pushes inside. Sam expects immediate harsh thrusts, isn't quite prepared for a long, intense push all the way inside.

Can't help the gasp when he feels Bucky force the bulge of his knot past Sam's rim already, just to make him feel it. He can tell he will feel this for days.

The metal on his cock makes him flinch, in surprise more than discomfort. Sam reaches between his legs, tries to push that hand away from him. Remembers, faintly, the prosthetic from Bucky's first.time here. Is annoyed that the thrill of unknown sensation gets to him. That his hole is opening so sweetly to the unwanted intrusion, that he's getting so wet already. Smart of Bucky to push his knot in before it's big enough to catch inside. It's like a signal to Sam's body to expect something big, and gets him wetter as a result.

Fuck. He can't even move Mich at all, not with how Bucky has him pinned face down.

"Ain't your baby," Sam grunts, trying to bear the sharp thrusts when they start. "And you're too young to be my daddy."

And yet the office fills with the scent of Sam's slick, sweet and cloying, a lure to any alpha - those with sensitive noses especially. Sam's body begging to be bred well, no matter what his mouth says.