re: Has anyone here dealt with the onset of mental illness with their spouse?

Yes

Very debilitating mental illness. She was abused as a child, and she had her first episode of audible delusions and extreme paranoia during a snow episode when we lived out of state. To the best of my knowledge, it didn’t run in the family, but she internalized a lot of stuff, so who really knows the truth of all that? I returned home one evening to half of our stuff gone and she not there. Sometime later we talked and she said she was off to find herself or whatever. It eventually ended in divorce, and that was for the best as we had no kids in the equation. I cannot imagine going through all of that then or today with kids involved.