Somebody who has only known an abusive relationship might mistakenly think that hitting, beating, pushing, shoving, or angry name-calling are perfectly normal ways to treat someone when you're mad.
This is also true of people who abuse someone they're dating.
But being abused is no excuse for abusing someone else.
Amy's finger was so swollen that she couldn't get her ring off.
She didn't think her finger was broken because she could still bend it.
It had been a week since her dad shoved her into the wall, but her finger still hurt a lot.