I strongly believe that MM is suffering from mental illness. I do not think it is something she has made up. My recollection of KM's life with her was that although she told him about her illness; she was embarrassed about it and asked that he not tell anyone else. He kept this secret even though he was pushed to the brink of a mental breakdown himself. This to me suggests that her mental health problems were a source of embarrassment and shame for her and her parents.
At one point, very shortly before she travelled to Ireland, she was taking 16 prescription medicines a day. She had also been prescribed another 10 medications which she was to take 'when necessary'. I cannot see anyone taking that many medicines just to avoid consequences. Whilst I acknowledge this is information provided by her ex. When he wrote the book, MM was a nobody, he protected her identity and, at the end, suggested he hoped she was well and cared for her. He had no axe to grind (IMO). The only reason he spoke out was due to MM stating during the custody hearing that she did not suffer from bi-polar or any other mental illness.
I feel that TM and SM hold themselves up as paragons of American middle-class. They had Four children, three boys and one girl. The three boys are all extremely accomplished. All are employed in federal or government jobs. Then there was MM. MM struggled in high school and missed a lot of time. She did not complete a college degree. She worked low paying jobs, a waitress, nanny, etc. This is not what TM and SM expected from their only daughter.
If anything, I believe that TM and SM have enabled MM her whole life. She has not had any consequences. They have held her up and being something perfect. When, IMO, she is very much broken.
IMO MM was about to lose the only thing that she had ever accomplished and that was being a mother. JC had refused to allow her to adopt the children. Her attempts at proving DV were coming to nothing. I think she knew she was on a countdown and snapped.
All IMO