Heaven
I used to argue with my best friend about the big "O". She said she could cum as often as she liked, I said she was making it up.
One night we got into a fight over it and she said she would show me. Tugging her panties down she just spread her legs, leaned back on my bed and started to masturbate. I could see her getting wetter and wetter, no faking there, then after a while her breathing started to deepen and she started to moan, reaching up under her top and was plainly squeezing a ..more.