I am in the belief that SL is not to blame for her bout with a mental illness... but he is to blame for exacerbating things to his advantage... he surely helped in furthering it. Things, mentally, seemed to be snowballing for her for a couple of years, now... and then Lutfi became a prominent figure in her life and it turned into a huge dangerous avalanche. I think he menacingly took advantage of her struggles with life and a mental illness... then he rode it for everything it was worth, it seems, by putting her situation on the express line to hell. As for questioning why her parents are just now stepping in: she is an adult... she started cutting off ties with them when they tried, last year, to make her get help by coaxing her into a rehab center. At that point there probably wasn't much they could legally do without direct proof of her being a complete and utter danger to herself and others. Up until last week, no medical personnel had officially said that she needed to be in the hospital because she was too sick to handle herself. (remember, her first mental lockup didn't stick and she was let out). Once the medical side said she was gravely ill, then and only then did her family have something legally concrete to stand on, IMO.
I can't fault her family for not legally stepping in sooner... she may be their child, but she is an adult that was able to do as she pleased and there wasn't much they could do about it. A lot of families struggle through this same situation every day, where they see their loved one deteriorate mentally. They fight like hell to get their loved one help through commitment, to only find that until their loved one is a danger and shown not able to take care of themselves: pretty much their hands were/are left tied.
A lot of the time the issue doesn't end like this (Brit committed and her family granted control), where the family finds the ability to legally step in: there are so many suicide/death stories out there where families tried to help their loved one, to only find their pleas shot down by the legal system because things weren't severe enough in medicine's eyes to warrant a commitment. So... thank goodness this isn't one of those cases.