Age becomes reality when you hear someone refer to that attractive young woman standing next to the woman in the green dress, and you find that you're the one in the green dress.
Your mother calls and says she hasn't seen you for a long time. The first year: You invite her for a week. You give her your room, and you both sleep on the lumpy studio couch. The fifth year: Your mother sleeps on the lumpy studio couch. The tenth year: You send the children to mother.
A mother becomes a true grandmother the day she stops noticing the terrible things her children do because she is so enchanted with the wonderful things her grandchildren do.