I am curious what is the bigger problem for him, that she did the movies or she hid it from him?
Personally, if I was in his position the biggest problem I would have is how this is going to affect my child. As she/he gets older, I would think there is a real chance their friends will find out about this and kids can be brutal.
No matter how much I loved someone, I don't know that I would knowingly expose my child to that risk. The woman, by hiding her past, made that decision for him. I am not sure I could ever get over that.
If children weren't involved I could get over it unfortunately that isn't the case. Of course those same kids now have an emotional attachment to her. Definitely not a good situation and it is much more complex then the bulk of the ATOT crew seems to grasp.
-KeithP