A MLCer sometimes feels it's the "family structure" that is smothering them. That's why some of them abandon their families. The reasons are not going to be good enough for your mind. You are not an MLCer. Just trust me on this: the MLCers mind is a complete wreck and very little, if anything, that they do WHILE in MLC can be considered healthy, life-affirming or otherwise normal.
The urge to run, to recapture some illusive thing they think they've missed out on consumes some MLCers. An inability to deal with life on life's terms lights the fire that's under their butts. All they feel is sad, dissatisfied, angry...and more often than not, they do not know why. Something is just "wrong" and it drives them to try to find something that makes them feel "all right". That is, of course, what eludes them. But a new person brings restored hope, albeit not by any of the MCLers previous standards. It's a lie. The new person, and the "hope" the MLCer thinks they bring, it's all a lie. And merely a symptom of what's going on in the scrambled, emotional mind of the MLCer.
Lastly, she's rebelling against all that was - which she has probably deluded herself into thinking was the root of her problem. That's another lie. But she has to come to that conclusion all on her own and the ride to get to that conclusion is going to be rough for all who love her. But it won't be more rough than it's going to be for her.
She ain't on a picnic, tiptoeing thru tulips without a care in the world.
She's in a life crisis.
The best thing for you is to be strong, take care of your son and do some introspection of your own. A MLC offers the chance for BOTH of you to grow. No matter what SHE does, do not blow yours.
Peace!
"Let anyone who thinks he stands take heed lest he fall" 1 Cor. 10:12