My mother was a mommy dearest..... cruel, mean spirited, abusive, narcissistic and manipulative. I see at least two of these traits in YoYo.
Shame on her for bringing up her children as a reason for not killing herself..that is so typical of a narcissistic, manipulative mother. No kid or adult not should have THAT kind of burden on them.
I doubt she's all that sick...well, maybe mentally.