What behaviors did Grandma Moore witness in the Karr girls as children that deeply disturbed her?

When Mary was young, Grandma Moore moved in with the family to help raise the girls when Charlie felt overwhelmed. Grandma Moore was immediately struck by the bad behavior of the girls, which involved fighting, cursing, and being generally unruly. Grandma Moore was most disturbed to see that the family ate dinner in the middle of the Karr parents' bed, and she swore to fix all these sins, one by one, until the girls exhibited proper behavior.