It's not hard to see what V is trying to do, but Connor lets it happen. He presses into it even, encouraging it. The longer they kiss, the looser the vines become, and now that he's started to allow V to touch him he finds he doesn't want to pull away. When he does break the kiss it's only to start pulling the vines off him in earnest, and they retreat- perhaps knowing that Connor is in no mood to play nice with them if they refuse to let go.

He tugs V into the bedroom and shoves him towards the bed, pushing down his own pants finally and stepping out of them before starting to tug at V's clothes. He isn't gentle about undressing him, letting his impatience show. Now that V is free of the vines there's nothing holding him back.