I won't forgive the uke if he goes and has sex with someone else out of spite.
I think Juri's right, though - it is said a few times that nobody's ever done anything to him in that sense, and he looked a little scared when the seme tried to do it again. But the uke's such a stubborn guy that I kinda feel he's just gonna him up with someone out of spite, though he'll probably regret it at the last minute, but the other guy will say "No way, now we're gonna go the whole way!" Cue rape attempt foiled by the sweaty seme (sweaty because he's been running round the area looking for the uke).
... Or something like that.
... kinda gave me anxiety. Momo is trying to do his best ╥﹏╥