You are making absolutely valid arguments and observations.
I think you are right on track thinking she has a void in her that only she can heal, but she's trying to find someone else to heal it.
Yes it probably is a pattern. It will probably continue in some form.
Again, I would encourage you to read some books on being married to a survivor of sexual abuse. I have some sitting around, you are welcome to them if you like. PM me your address.
I'm not saying you should or shouldn't, but this is a life changing decision and I think you should be well informed about the specific nuances of dealing with someone who was sexually abused.
Me: 35 Her (WAW): 34 D8, S5, D2 T:16, M:9 BD + D: 4/3/2015 EA Confirmed 5/6/2015 Separation under the same roof