At times, when he could twist his hips just right and the hums of Zemo's moans eased him that much deeper, he saw stars in the back of his head. Bucky would swear he was going to end up cross-eyed by the end of this. That fuse was growing shorter and shorter by the moment. Christ, he shouldn't have been this turned on just by how eager Zemo was about having himself be used like this. But he was. Painfully. Bucky knew he'd feel guilty about the scratches and bruises after. He also knew how much he wanted to see those marks on Zemo. Like he was trying to make some kind of physical display of the man; an unspoken but affectionate mine.
He fell backward, the bed making a small thud as he hit the mattress. The new angle gave him more room, letting him maximize that leverage aggressively. Zemo was holding onto him for dear life, refusing to let go or let up. And Bucky took advantage, plunging himself as hard and as deep as he could as he chased that sharp edge. "Zemo- I'm .." he tried to warn him, knowing how near that line he was.
Fuck, he couldn't stop. Zemo's bright red lips and wet eyes just fueled him on, those muffled mewls pushing him closer and closer. Yes, yes, please he hissed repeatedly in between the husky groans. His legs started to wrap themselves around Zemo's shoulders, lifting his feet off the floor and using him for balance. He would've contorted himself in any way, any position, as long as it meant more of whatever little slices of heaven was coming out of Zemo's mouth.
Bucky had let his eyes fall shut, head rolling back as he let his world become nothing but this man and him alone. His name had fallen like a prayer out of his mouth too many times to count. That white-hot pleasure that had his toes curling and his mouth dry with want was building faster than he realized. When he opened his eyes and saw his own hunger reflected on Zemo's face, he was done for. It hit him like a hammer, the sudden climax stealing what air he had in his lungs. He couldn't stop, even as he felt Zemo's cheeks fill around him, continuing to thrust until he was limp and breathless and so wonderfully sated.
He didn't waste time moving on though. His cock was still throbbing and wet when he pulled Zemo's head back. He was a mess but he didn't care. "Stand up," Bucky untangled his legs from him, letting them fall back to the floor. The second he could, he lifted Zemo from the floor and turned to drop him on the bed. He moved quickly over him, smiling down at him. "My turn..."