My H was an only child. When his father was alive his job entailed travel over 50% of the year, leaving MIL all alone. H became her surrogate H. When FIL passed away 15 years ago she became unbearable.
She used to make him rub her feet in front of me, she would take him as a teen to get facials and haircuts together. She would make him accompany her to plays at the local theater. She treated him like a king, bought him anything he wanted and doted on him hand and foot.
I could never compare. She was always the perfect martyr. Oddly enough, she was emotionally vacant, and could never speak of emotions...hence H adopted this trait, which we are working on now.
When she would make abusive comments to me, he would actually NOT believe me and think I was lying. She mentioned that we should abort the first year of our marriage, that he never should have married me, that I was lazy etc etc...the list extends to hundreds of toxic actions and comments.
She tried to take over my role as mother with my first born son. She would drop by endlessly, buy my son gifts which were excessive and mistakenly call herself "mommy". My son finally stopped getting her confused with me and calling her "mommy" by mistake when he turned 4.
My H and I met young...she was the boss...that dynamic continued until I started getting sick of it about 7 years ago (we have been together for 20). My spine finally started growing....
Just this past year, when the shit hit the fan, and our d-days were revealed, it was through counseling that we realized that the root of his inability to put me and our marriage first was because he was in essence "married to his mother".
I put my foot down the day after D-day and told H that if we have ANY chance to R that we must both put each other first.
We decided this year to have our first xmas together as a nuclear family alone without her boundary stomping and taking over. When he finally got the balls to email her this (as well as also informing her of his realization that he was enmeshed with her and should have been putting me as a priority instead of her all along) she FREAKED out and went crazy. She basically told us she was cutting us off.
This was the BEST thing that has ever happened to us!!!! We are finally free.