I agree this is WAY too much of a “gray area”, and would depend on the individual circumstance.
Say you and your spouse go to bed. You’re very tired, and just want to go to sleep. Spouse starts initiating sex (“seducing” you). You say “I’m really tired. I just want to go to sleep tonight. I’m sorry, hon. We’ll do it tomorrow.” Spouse keeps initiating (rubbing back, kissing neck, etc.). You sigh. “Seriously. I’m tired. I just want to go to sleep. Stop it.” Spouse doesn’t stop. Your body starts to respond (because you’re human). “Ugh. I’m TIRED!!” Spouse continues, so, you roll over and “give in.” (and of course, enjoy it, but are probably irritated when you wake up the next morning still tired because you didn’t get to go right to sleep like you wanted to). This isn’t rape. I don’t know if the OP is talking about an unmarried, who, say went back to one or the other’s “place” after a date, and something similiar happened (except maybe the objection was "no, we’re not married/I don’t know you well enough, etc.). I’m not sure that could be considered rape, either, though. Unless the person told the other person to leave, and they wouldn’t, and continued the “seduction” while the person CONTINUALLY said “no” the entire time. Absent some show of force or threat of force, that’s the only way (saying “no” the whole time, not just once) I can see how it could possibly be considered rape.
In Christ,
Ellen