My Sister and Me Pt4

Thanks for all the great feedback and positive votes. I hope you all will enjoy this installment and continue to vote for me…
And now, on with the show!

I couldn’t believe what had happened in just the last few days. And now, I was sitting in my sister’s living room waiting for her to get home from work. She was bringing her girlfriend into our mini-orgy. It was all a bit mind boggling.
I was drinking a beer when I heard a key twist in the door lock and my sister came in. Behind her was her friend, Marty Brewer.
If I had been the kind of person who was surprised easily I would have spit my beer out and probably choked to death. Marty was absolutely gorgeous. As near as I could guess she stood about five-two or three; her hair was brownish blonde cut rather short and her eyes were emerald green. She, was at a minimum, a C cup and around a thirty-six.
“Don’t let your eyes pop out little brother,” my sister said sarcastically.
“Huh, what? Oh, sorry, I was starring, wasn’t I?” I felt my face flush.
Julie laughed. “Well I guess you approve of my friend anyway.” Then just to embarrass me a little more she added, “Is your dick hard yet?”
Marty walked over to where I was sitting. She held her hand out. “Don’t let her get to you. I’m flattered that you find me interesting.”
She was far more than interesting. I wanted to say something suave and debonaire, but nothing came to mind and so I sat there like a boob.
Marty turned back to Julie. “Don’t tease him! I think he’s cute”.
Cute? Cute? I did not want to be cute. I wanted to be handsome, hardy or at the least attractive, but not cute. And then Marty turned back to me, leaned over and kissed me on the lips. Not just a “nice to meet you” kiss, but a full blown, open mouth, tongue snaking, let’s get it on kiss. When she broke it off, she smiled and said, “Cute guys turn me on”. And then she walked away. I gasped for breath like some kind of high-school kid.
Julie had picked up Chinese for supper and we three sat on the floor, Chinese style, eating with chopsticks.
We talked about normal everyday stuff and eventually my cock settled back into standby mode.
After supper the girls cleaned up in the kitchen and I sat in the living room drinking a glass of brandy. Every so-often I heard a giggle come from the other room and I hoped they were talking about me.
Finally, after what seemed like hours, the girls came out and walked by me without a word. They went straight into Julie’s bedroom and closed the door. This was getting too much like high-school now. Ten minutes went by when Julie called out.
“Tommy! Can you come in here for a minute”?
I set my glass down on the coffee-table and went into the bedroom. I nearly fainted!
Julie was wearing a black thong and small black bra pulled down low so her tits hung over the top instead of being inside.