Sportman's Double

SPORTMAN'S DOUBLE
A bloke named Eric pulled an older woman at a club one night.
She was a good looking sort for 55 years old, they drank a bit, had a bit of a snog & she asked if he'd ever had the sportsman’s double, a mother and daughter threesome?
He said "Hell NO!!".
They drank a bit more, then she says that tonight was his lucky night. They went back to her place and he was getting more excited by the minute.
She walked into her house and put the hall light on & and shouted upstairs: "Mum you still awake?"