Well welcome to msf
I’m not sure what to say on the divorce front. My divorce was a necessity. Would she be open to counseling? You could bring up your concerns and have a third party mediator. My daughter is 40. She and her boyfriend have been in counseling since oh, I don’t know, 4 yrs ago? They only go once a month now but it helps them over the humps of this modern world. They were very close to splitting up when my granddaughter was a baby. But they are doing better than ever now.