Just My Luck

The other night I met an older woman at a bar.  She wasn't bad for 57.  We drank and talked a bit.  Then she asked if I had ever had a mother daughter threesome?  I said no.  We drank a bit more.  Then she says that it is my lucky night.  We go back to her place.  She turns on the lights and a little music.  She then shouts upstairs, "Mom, you still awake?"