Although, to be honest, I do partially agree with the crazed Islam.
Whilst raping the poor wife after she's said no is obviously not acceptable, I think the wife does have to play her part and "take one for the team" occassionally, even if she doesn't feel like it.
That doesn't mean that she has to say yes every single time the husband asks for it, but marriage is about sacrifice and compromise, so saying yes a few times when she actually wants to say no isn't going to hurt her, and in all likelyhood will help to keep the husband satisfied with the marriage.
Similarly, the husband should take one for the team when she wants to have sex.
Statistically this is less likely to happen, but still. Maybe instead, the husband can sacrifice his time and effort by taking her out for a nice dinner and giving her the attention she deserves occassionally.
Sacrifice and compromise, people.