She was hitting on him as a 16 year old, if anything she was the predator in this situation, and are we going to ignore that she tried to have him killed before then? Why did she have Jack if she got raped then? You can't tell me she didn't want it, that's not rape.
Diane was doing her job.. Since you can't explain why she was mentally unstable afterwards.. you are sorta fuck up because no women wants to be embarrassed with forceful impregnation.