A woman has some trouble  with her eyes, so she goes to see the doctor. He is a new doctor and doesn't know her, so he asks some questions and one of them is, "How old are you?" The woman says, "I don't know, doctor, but let me think about it." She thinks for a few minutes and then says, "Yes, I know now, doctor! When I marry , I am eighteen years old, and my husband is thirty. Now my husband is sixty. And that is twice  thirty, right?" So boys and girls, do you know the woman's age now? The woman can't remember    _   age.
the doctor's her husband's her her son's