Married women/men can be raped repeatedly and stay married. Casual dating the same thing. I can't speak for her, but sometimes an individual denies the act or minimizes the seriousness of it. It's psychologically and emotionally complicated. Maybe there is a psychologist or expert on this board who can answer that for you b/c it's not easy to answer. jmo
Of course it is very complicated. I can't imagine myself having anything else to do with someone who raped me, but I can say as a rape victim, the first answer that comes to mind is DENIAL. Isn't denial the first emotional reaction to coping with a traumatic event? I was raped 50 years ago and to this day if I have to think about it, my first reaction is to shut down and try to fight off the memory, to stuff it again. That is why it is so brave of women who do come forward. I am sure some women who are raped by their husbands live in denial as they try to cope.