Yes she was and she has accepted responsibility for it, I just can't help but wonder how different her life could have turned out had she not met this piece of garbage. MOO
While I don't think 'innocent dupe' is the correct term for TLM, as she is definitely just as guilty, it is clear that she was used and manipulated. She was NOT the driving force. She is mentally ill and did it 'for a little bit of love'.
I don't think her life would have turned out much differently. She probably wouldn't have killed a child, unless she met a different man with such desires, but I do believe that she would have went on to kill somebody.
JMO