I probably wasn't clear, others weren't controlling her, however, she had no self-worth, therefore, influenced by others. Didn't want to work on self. Wanted to sabotage others for what they had and for what she didn't have. moo
I think psychological analyses are interesting, and probably contain a lot of truth about her, but also about millions of others who do not take that step of deciding to actually murder someone, to be personally responsible for eliminating them from the face of the earth, at the risk of destroying one's own future in the process.
IMO, that impulse is something that operates independently of these normal issues of low self-esteem, spiritual bypass, whatever.
And we saw, after the murder she was quite capable of behaving in a very self-controlled manner, deceiving her boyfriend completely, having her act together enough to take her destiny into her own hands and escape to try to live alone by her wits, etc. And now, to be able to declare herself not guilty and face trial, all of which a weak person would not be able to do, they would have just waited to be arrested and pled guilty, or commited suicide.
I don't think the ordinary psychology of negotiating self/other in complex social relationships can explain those behaviours. IMO, those behaviours involve much more primal issues, a whole different part of the brain, the ancient part of the brain that is ruled exclusively by greed and hatred, not the subtleties of social interaction and convention.
JMO