No one, as yet, appears to have picked up that the boys had not been in full time care, by Sheila, since they were a year old. I'm perfectly certain she wouldn't have known how to be a mother because she'd never experienced mothering -at that age- from June. However, it doesn't seem that lacking the ability to care for her babies, at that time, had anything to do with mental illness. It seems to have been more a case of she didn't know how.