Twin's Surprise, Part 2

Twin's Surprise, Part 2 by cactusman

"If you rested a bit, could you do it really hard and fast for a little while?"

"Yes, mistress," you agree, "that would really make me ache, especially if I got right to the edge before you... before you stopped me..."

"Mmmm," she purrs, "that sounds perfect! Rest now, because I really want it hard and fast!"