There were three old ladies sitting around the kitchen table - Gertrude, Eunice and Harriet.
Gertrude said, "I think I'll go upstairs now and take a bath."
She took all her clothes off as she was filling up the tub, she had one foot in the tub and the other still outside. She said, "Was I getting into the tub or coming out of the tub?"
Eunice and Harriet were downstairs chatting with each other, when Eunice said, "You know, Gertrude's been up there for quite a while - I'd better go and check on her."
As she was going up the stairs, she stopped and turned around and said, "Was I going up the stairs or coming down the stairs?"
Harriet was left sitting at the table by herself. After she heard Eunice's remark, she said, "Thank goodness I'm not that bad, knock on wood. Was that the front door or the back door?