I know two (aside from janbb) but I don’t know them well.
One, the husband was cheating. I don’t know if he was a serial cheater, or just was with this one woman. I also don’t know if he stayed with the other woman.
Another, I became aware of because I am a caretaker for a friends rental property. I don’t know what happened, and I don’t know how long they were married. I live in an active adult community, so over 80% of the people here are over 55, a huge portion are 65 and older.
Lastly, my MIL “leaves” her husband quite a bit the last few years for extended periods. She is 81. I think she would divorce him if they had enough money, or even if she didn’t do legal paperwork, she would get her own house and live in her own if she could. She has never worked, and they typically spent most of what they earned, and they earned a lot of money before moving to America, and while here earned a decent middle class income. They get $300 a month combined SS.
He has cheated more than once, she doesn’t trust him at all. She’s very mean to him at this point, but it’s a result of his chronic dishonesty, she can’t get over it even if he is true to her now. The lack of money makes it much much worse. She can stay with us for as long as she wants, any of her children really, but she doesn’t seem to like staying more than 2 months at a time. It is a little difficult when she is in my house, she kind of takes over the kitchen, but she never feels completely comfortable in my kitchen. Plus, my current house is small.
Now, that they sold their house (couldn’t afford it) they now both are staying with one of their kids at a time for extended periods, but it’s not a great situation. My MIL basically feels she lived a life that wasn’t her own. She loved having her kids, but I see her regret about not having ever done anything outside of the house. Her husband, my FIL, was extremely controlling when they were young, they both are controlling actually in their own way. He, didn’t want her to wear make-up, he would make her literally salt his food at the table, he would take her places like to the doctor (it was to watch her) he had hit her in the past—very controlling.