@DogeNatural
She probably killed a bunch of people too if they had commissioned it to be invented, manufactured, and used. (As is heavily implied by all her backstory. Its easy to overlook when its not you and your family who is dying.)
And she was the one who decided to keep it around, bringing it into her home with her baby. (Knowingly or unknowingly, she pocketed an explosive and forgot about it? That's just as irresponsible.)
The saying goes: "Play with grenades, and it will explode."
Its sad, but it was her own fault.