LaborDayRN, I wondered also if something big was happening that made the mother feel she was losing something crucial and couldn't go on.
I wish I could answer your questions, but I wasn't able to get a handle on the children's independent lives. It wasn't clear if they lived with Mom or had their own places. Erin said married naming someone on left side in intro of her fb, but that person didn't seem to still be part of her life at present. Sorry, don't know if the son had a significant other either, but maybe someone else on here knows more.
IMO, her children looked up to her or so it seemed. Perhaps they were somewhat proof of her accomplishments. She, for some reason, couldn't leave them alive to go on without her. It's unexplainable to me.
Erin Edwards