The Older Woman

Went to the local pub and found myself drinking with a woman of 61 years old. She was in pretty good shape given her age and kept coming on to me. I was getting somewhat horny when she asked ' Have you ever had a Sportsman's Double'

'What's one of those' I asked, eagerly
'Mother and daughter threesome'
My imagination went wild and I quickly replied 'I'm game for some of that'.. She said 'Tonight's you lucky night'
We went back to her place, she switched on the light and shouted upstairs ' Mum, are you still awake?