One night the 96-year-old draws a bath. She puts her foot in and pauses. She yells down the stairs, "Was I getting in or out of the bath?".

The 94-year-old yells back, "I don't know. I'll come up and see."

She starts up the stairs and pauses, "was I going up the stairs or down?"

The 92-year-old is sitting at the kitchen table having tea listening to her sisters. She shakes her head and says, "I sure hope I never get that forgetful".

She knocks on wood for good measure.

She then yells, "I'll come up and help both of you as soon as I see who's at the door".