Good question. To this day I don't know, perhaps because my work took me abroad for extended periods. Her mother was aggressively unbalanced and, as time went by, she developed similar symptoms. Not great for me, but far worse for our two children. Finally divorced in 1986 after 23 years of marriage. Posted to Bangkok, I met and married a Thai lady in 1990. She is now 70, I am 82. We are still together, and very happy to be so.