It's called switch and bait. Happens all the time. It's easy to lie, deceive, manipulate, and "be a good actress" if there's a pot of gold at the end of the rainbow. My salary is among the top 2% in my city.<quoted text>
People do change. I think initially it tells whether the other person is giving and compassionate but some are good actors.
I'm surprised she was kind and caring for 3 years and then changed.
One thing is sure. My SO grew up without brothers, and after 9 years of age, lived only summers with her father.<quoted text>
Having children often changes a woman. I think it changed me for the better. Having sons helped me to better understand men. Perhaps if your wife had boys she might have been different.
I too had hoped that being a mother would mitigate my SO's selfishness. I lost my bet.