I didn't know what to say. The only thing that I could stammer was, "Uh, uh, hi, Mom. What brings you here?"
I turned as red as a Jersey tomato, because I knew that I was pretty much screwed since my sister can't keep a secret.
"Come here, right now, mister" demanded my mother in a rather stern, but sexy kind of a way. I wemt over to the bed to see what she had wanted. "Drop that towel, right this second and don't ask any questions."
"But, Mom, what is going on" "Did I tell you not to ask me any questions, why would you feel the need to ask me a question, young man."
With that, mother tugged off the towel that was covering my lower body and turned me around, so that my ass was in her and my sister's face.
"Bend over that bed that you were suppose to sleep in last night, now." I obliged, because I didn't want to get into any more shit than I already had found myself to be in. The next thing that I know, mother was smacking my bare ass with her high-heeled shoe that she had been wearing.
She smacked me about a half-dozen times and it seemed like it was getting harder and harder with each sound of heel touching skin. My mother handed the shoe to my sister, who did the same thing as mother had done, only moments ago.
My mother demanded that I stood up and face the two of the them. I stood up, standing at full attention with my hands behind my back, rubbing by now red backside. My cock was hanging there it started to get hard, especially because it was only a couple of inches from both of mouths.
"Your sister told me what you did to her last night." (The truth is that a couple of weeks ago, mother and I had fucked like two teenagers when we went on a trip of our own).
I was a little hot under the collar about this, because I figured that not only would I never get any more "play" from my sister, but my mother would definetely cut off the fringe benefits.
"I think that there is only one way for you to redeem yourself, son."
My mother stood up and demanded that I undressed her, so that is what I did.
First, I took my mother's white shirt out from her skirt's waistband and unbuttoned one button at a time, as I stared at her beautiful busom. Underneath, she was wearing a white lace bra that held her beautiful tits up into a perfect offering. I left her bra alone, as I slid my right hand behind her and found the zipper to her black skirt, and pulled the skirt down to see white lace panties. I undid mother's bra at this time, and pulled down her panties.
My mother went to the bed that I was suppose to sleep in the previous night and laid down on her back with her legs spreaded way apart. She told me to help my sister up off the bed and to undress her. My sister was only wearing a white robe that the casino had provided, because we were fucking like rabbits not too long before. I took the ends of the knot that she had placed into her robe and pulled at both ends, so that the robe dropped to the floor after I slid it down a bit.