Yes, poor Rosemary Kennedy, who it turned out had not been mentally ill at all, but merely rebellious, particularily against the ironfisted rule of Mother Rose. This was enough for the Mother of all Kennedys. In Emmett Tyrrell's grim phrase, Rose "had her lobotomized and parked her with the nuns."
Rosemary died in a Wisconsin convent not long ago. She's in Heaven, now.
Hope she doesn't feel too lonely up there.
Joe had her lobotomized on his own, without his wife's knowledge. There are hints in one of the books, perhaps Sins of the Father, that this was convenient if Joe had molested Rosemary. Joe went after young girls, including the girlfriends of his sons. His sons warned their dates to keep their doors locked against Dad. Joe also had his "Bull Pen" where he sunned himself nude in the yard. No one was allowed in. Very weird, sick, sadistic character.
The lying about Rosemary has been of mythical proportions. The Kennedy turned all their disasters into "tragedies." The rest of them would fill several books - they already have. I doubt whether we know a fraction of it.