“Sally what are you doing” you whisper again looking over to see if your friend is still asleep. “Shhhh” she says as she reaches around her hips back to where your cock is underneath her. She grips it and starts jerking you off while she straddles you. She’s staring right at you and clenching her teeth. She seems to know exactly what she’s doing. Her hands are so smooth and it feels so good you’re trying to breath quietly but frightened what your friend might do if he wakes up and sees your cock in his little sisters hand! Your balls grow tight and you can feel the big load being made by this naughty sally.