I never wanted to question her commitment to her motherhood, but it's getting harder and harder not to do that. Every time she's taken one of these trips -- at least ever since the Boy-Child was born these 11 years ago -- it's been "oh my God it was so great being free, I have to be free, my freedom is so precious, I could have stayed another month, blah-blah-blah," which as husband I'd always tried to ignore or put in some kind of positive frame. When I called her out once (3 or 4 years ago) for being gone 2 weeks without a single phone call, her "explanation" ran something like this: "How do you not understand this? When I'm on a trip I don't think about you. I don't think about the kids. I don't think about the house. I'm free! Don't you get that! I don't want any reminders!"
OMG, I think that is just horrific. I cannot even begin to articulate how much this disgusts me.
I do think your mother is correct as to what's going to eventually happen. I think you will end up with full custody of your children, and I think that will be a GOOD thing.