Sportsman's Double

I'll confess, I ended up with an older woman at a bar last night. She looked pretty good for a 60-year-old. 
In fact, she wasn't too bad at all, and I found myself thinking she probably had a really hot daughter.
We drank a couple of beers, and she asked if I'd ever had a Sportsman's Double?
"What's that?" I asked.
"It's a mother and daughter threesome," she said.
 As my mind began to embrace the idea, and I wondered what her daughter might look like, I said, "No, I haven't."
 We drank a bit more, then she said with a wink, "Tonight's your lucky night." We went back to her place.
 As we walked in, she put on the hall light and shouted upstairs, "Mom, you still awake?"