i dont know people can develop mentall isness when they had perfectly normal childhoods its gentic in some people.
I know, nugnug.
Colin for instance believes that Sheila was in fact not mentally ill, but that she "carried" June“s illness for the whole family. This may sound far fetched, but it is quite common.
I knew a couple where the wife came down with a mental illness - she went to a psychiatrist. It turned out that there was nothing wrong with her, but her husband had a mental illness.
He got treatment and all was well - I guess.