(A!A) On the other hand, Steve isn't comfortable having sex under the circumstances. Even if, and it would be awfully dubcon at best when it's not clear what Bucky actually thinks is going on (for all Steve knows, the asset might think they're preparing to go deep cover in the Avengers and HYDRA is letting it try out its Bucky performance with Steve's assistance), Bucky is genuinely enthusiastic about sex with him, inaction is maybe the best idea right now. Steve's consent is important too and it's been a while since he could base his sex life on his actual feelings.