Heidi bit her lip as she grinned at the remembrance of that time. She knew exactly what she did with her finger, but wanted to tease Tracey. "It's a little fuzzy though. Why don't you refresh my memory?"
As the fact became more and more clear on what Tracey wanted to do, Heidi found herself getting more and more excited.
"You want me to shag your arse?" she breathed, letting her hands roam over Tracey's arse and give it a light squeeze for emphasis. "I think I like that idea..."