Yes he is sexually assaulting her, yes he is abusing her, yes he is blackmailing her, for every decent human being this is seen as bad, even by me it seen as bad, but that has nothing to do with how a body reacts, if her body likes it and it makes her horny, then the body force the mind to remember that incident. For a normal being that would be disgusted seeing that happen, and i'm sure Laura feels also disgusted and ashamed, the reason why she cleans herself, but if her body is still horny and hot that doesn't help.
That why I said, if she didn't let it happen from the start it would never came this far. Some people's bodies just get turned on by being hurt, being abused, why you have those people into BDSM, it not because your body don't like it, or your gf's body don't like it, that Laura's body shouldn't like it either. That why we all different, some like that handling, others don't.