Cher’s daughter’s mental illness is entirely due to her freaky mother. “Cher” was obsessed with thinness and a weird version of femininity as being thin, and I think her daughter just rejected the whole thing (but not knowingly).
Many people have been molested by somebody of the same sex (a camp counselor, etc.) but are not hugely overweight dysfunctional lesbians. This is all on Cher and the Hollywood culture.
Sonny Bono was originally more supportive of Chastity’s lesbianism than mother Cher was.