To my surprise, she moved to my hips and roughly pulled my underwear down and off. "Your wife asked me to give you the full treatment,"

"What is that?" I asked, stunned and feeling uncomfortable, finding it hard to believe my wife would want me nude in front of her sister.

"Oh, that is for me to know and you to find out," she replied, in a tone that only made me worry more. She moved her hands to my ass and poured oil on it before she began massaging.

I stammered, as my dick began to rise, "I-I-I don't think Amanda would approve of this."

"Trust me," she replied,...