I've posted about issues like this before. What I think is that, when it comes to describing what a woman should expect from a loving relationship we should move away from what is/isn't rape and focus on what is and isn't loving, genuine sex with a caring partner. When you try to dissect rape it's far too easy to get bogged down in semantics, as this thread has shown. Rape is a criminal offence and as such it needs to have a fairly narrow definition, otherwise it's difficult to prosecute.
Sex should be a fun activity that two people engage in willingly, either to gain pleasure or to make a baby, or both. Sometimes people have sex to make their partner happy - again if this is entered into willingly, to gain the pleasure of pleasing a partner, then great. If sex is entered into unwillingly for some other purpose then it might not be rape, but it's not genuine, loving sex, it's something else.
Having a black and white rape/not rape mindset does not do women any favours. Yes, it is necessary in a court of law, but as laypeople discussing what is right for women we should forget the rape/not rape dichotomy because it is destructive and belittling. It implies that if what happens to you, no matter how negative, doesn't fit under the strict definition of rape, then it's fine, you have nothing to complain about.
Do we really want to teach our daughters that? What we should be teaching them is that yes, rape exists, it's a very serious offence and this is how you recognise it. But beyond that there are many ways for a partner to disrespect you and take away your autonomy that don't fall under the strict definition of rape, and just because they're not legally defined does not make them any less wrong or damaging. Your partner won't be convicted for them, but you sure as hell shouldn't put up with it.
The bottom line is, sex is supposed to fun. If you don't want it, don't have it. If someone doesn't respect your right to enjoy sex, then get rid of them. If they go one step further and deny your right to say no to sex then they have committed a crime and you could prosecute for that.