I have a friend of 35 years history who for the past 15 years or so was in an abusive marriage -- no physical violence that I know of but he was suspicious, controlling, spent her money (she was the higher earner) like it grew on trees, called her at random if she was out shopping, etc., to check on her. Most selfish man I've ever met.
(Ex: when she was packing to move in with her mother for her mother's last days dying of lung cancer, his comment was "But who is going to cook my meals?")
Fast forward to a couple of years ago; he gets an early onset and fast-moving form of dementia and dies within 15 months. She was working full time and his only caregiver (his adult children from another marriage washed their hands of him years ago) so I used a lot of my annual leave trying to help her with logistics, with "babysitting" him while she did necessary things like get new eyeglasses, going to distressing meetings with her about having him restrained and medicated, etc. I was happy to do so. She didn't love him any more but did her utmost for him out of a sense of duty/moral obligation.
He dies, and after the funeral I thought to myself, "Well, I didn't wish him dead but she'll certainly be less constrained now, she'll be free to do more fun things and I look forward to that. Like the old days."
Wrong. She immediately had her bathroom renovated and the contractor who did it literally the first man over the doorstep after her husband's death became her boyfriend and still is 3 years later. She exerted all of her energy into integrating herself into his family helping host holidays, fixing up his garden, helping his daughter prepare a nursery, building play areas for his other grandkids, you name it rather than into reconnecting with old friends, me among them. She'd make lunch and take it to his jobsites, actually learned to operate heavy building equipment "for fun" and to assist with his projects, the list goes on.
I tried to keep in touch, but when I found that I had been excluded from an annual seasonal party she gave, but that the new guy's clan, her new neighbors, and even an old workmate neither of us had seen in year were invited, I threw in the towel. No more chatty e-mails, no more calls, no more "cheering up" cards in the post, nada.
Months later she got in touch "Have I done something to offend you? How can I make things better." and I said "Just busy these days."
It's not worth it; clearly she is one of those who will always prioritize her man over female friendships, and wants to be in a couples-only social circle. Tbh I regret using so much annual leave and other resources on her during her husband's illness. Only to find out I am low person on her pecking order.