Three sisters, aged 92,94 and 96, who are all losing their marbles, live in the same house together.?

One night, the 96 - yr old runs a bath. She puts one foot in and pauses. Then she yells to the other sisters, "was i getting in or out of the bath?" The 94 yr old yells back, "i'll come up and see." She starts walking up the stairs and pauses. " was i going up the stairs or down?" she shouts. The 92 yr old is sitting @ the kitchen table having tea, listening to her sisters. She shakes her head and says, " I sure hope i never get that forgetful - knock on wood" she then yells, "i'll come up and help both of you as soon as i've seen who's at the door."