義理の姉が私にフェラチオの方法を学ぶのを手伝ってほしいと頼みました!

Stepsister asked me for my cock to practice blowjob. She wanted to surprise her boyfriend. She was doing great and I was almost done, but she decided to stop. I said that wouldn't do, and if she didn't want anyone to know about it, she'd have to spread her legs!