There are a lot of people who are not able to live up to their partner's expectations. A lot of women think it is a hassle to have sex as much as their partner wants to. This is independent of whether or not she has been sexually molested as a child. The problem perhaps, is that you both have different levels of needs which are not in agreement. However, if you still want to stay together, you need to accept the fact that she is not able to give you all that you need.