I'm sorry, but I don't think you over-reacted AT ALL! You must have a difficult relationship with someone that seems to not really care about her granddaughter. And your thought about your childhood was probably "spot on" too! The LAST time my mother ever babysat, I returned home to learn that my 7 year old had been outside in the dark feeding my mothers dog by her car (I TOLD HER NOT TO BRING IT arrrrg) and she had made my daughter cut her toenails. ewwweeee She was abusive to me, but I never really thought about it or realized it until I had children. I eventually cut off all ties with my mother when my childhood memories caught up with me!