So a kid being afraid of how their kids might react (a common trait in children) makes them insane?
Are you insane?
I'm not saying she's insane for being afraid of how her parents would react, I'm saying that she was possibly temporarily insane at the time of termination. People do a lot of crazy things because of fear and adrenaline.
I realize I may not be using the best choice of words, but basically
Afraid of how the parents will react = panic = rash decisions
as opposed to
Afraid of how the parents will react = calm = calculated decision