I think that if she was deathly allergic to peanuts, she would have/should have been in a routine to read all ingredients on any packaged food that she was considering eating.
It does not seem to me like this is the fault of her friend’s family nor that of Reese’s Chips Ahoy cookies.
Sad, but sometimes there really is no one to sue. JMHO
Not reading the ingredients is the same as crossing a busy street without looking both ways. Just like it’s not the driver who hit the person walking out into traffic, it’s not Reese’s fault she died. It’s her fault and her mama needs to realize that.