I am sorry she was not given the death penalty and with it the peace she seeks. Five dead children should have made the DP a must; she is beyond earthly help.
That is what you consider to be the motivation behind the murder? I think you just proved the case for the defense.
A sane and deliberate requires a motive, the one you gave is about the weakest I have ever heard. If the woman wanted help, why did she stop taking the medication?