突然、義兄の太いペニスを見て、サリは恥ずかしくなり、私に性交の仕方を教えて言いました。

Brother-in-law was shaking his penis in the room, then suddenly sister-in-law comes and seeing brother-in-law's big penis, she gets shy and says what is this and why are you shaking brother-in-law..