義母は私が彼女の入浴を見ながら自慰行為をしているのを見つけたので、彼女は私にレッスンを教えることにしました

I fancy my stepmum like crazy so I always watch her anything time she's bathing to masturbate, on this faithful day she caught me red handed and decide to punish me. I kind of love this kind of punishment though.