Hrm. I guess that would depend on the alien culture... I mean, she called it "playing a game." If that's about the depth of meaning the aliens put on the implanting of a baby, then Trip is more or less the victim of a cultural gaffe. She was also surprised he ended up pregnant - she didn't think it could happen inter-species...
I dunno. He was willing to play a game with her, and she wasn't forthright in what that game was - unless, like I said, her culture views the passing of genetic material to their men to be pretty much that important: hey, you want to hang on to my baby and give birth? Oh, okay, sure.
*grins* I think it was kinda campy, very TOS-y, and made me chuckle - I think Trip didn't feel particularly violated, which is, I suppose what it comes down to - how the individual feels about the act.
The Doc
So you think, 'Might as well,
Dance a Tango to Hell,
at least I'll have Tangoed at all.'
-- "Rent," Jonathan Larson