I second everything about the sexual abuse part. As you are aware, my ex's history of abuse (sexual/physical/verbal/mental) has a very distinct and wll-deserved fear in me. She was sexually abused in every form imaginable, burned with irons/cigarettes/etc, beaten severely, and the list goes on and on and on. I'm concerned that even though she does love them in her own way, that some form of it will creep into them.
I've seen the yelling at them and the one time she shook my daughter (age 3 at the time)...she caught herself doing it and the look on her face, well was not easily describable.
I have spoken to my lawyer on this and he said that I would have to prove her unfit, which is very hard to do. Since she "passed" the military's psych evals, I may not be able to. He said that unfortunately, due to the laws, that there isn't anything I can do until she commits the act.
There are moments in this life when you are so confident in the rightness of your actions, that not even for a second do you consider the option that you might be wrong.