I drove to her house trying not to think about my wife's ass or the way her nipples pressed into my hands through her nurse uniform. The more I tried not to think about her, the more I could not help it, so I just concentrated on the drive and listened to the radio. As I pulled into my sister's driveway I could see the house was hopping with people. She was not in costume when she answered the door, just a plain dress but she looked great anyway.
"Hey sis... I thought this was a costume party," I said looking at hanging stethoscope.
"It is but I have a surprise. I bought the wildest costume you have ever seen and I am on my way to put it on now, besides good things come to those that wait." she said kissing me on the cheek.
"I have to go and change. Go help yourself to the food and drinks," she said hurrying off to her room.
I was not disappointed at all - there was eye candy galore. When I said my sister had hot friends, I was not kidding. It looked like a Playboy convention. Some of the outfits were so incredibly sexy; they even made my wife's costume look tame. One girl was dressed as Wonder Woman in a costume so thin you could see the outline of long hard nipples pressing against the thin material. My favorite thing about her costume was it was so tight you could see the material pressing up her pussy and that she was definitely shaved.
One of my favorite costumes was a pirate, worn by a girl with huge breasts that kept trying to get out of the top. It was so low cut that it just barely covered the nipple. The whole back of her top was open and I could just see the crack of her ass. My hard on seemed to just keep getting worse and the only solution that I could think of and that was to drink. I got a beer and started downing it; I knew I could pick up a girl in a crowd like this but I in no way wanted to cheat on my wife. So I drank and just enjoyed the show.
The party was really going well and I was way past the point of "feeling no pain", when I saw my sister motioning for me to come over toward her room. Just from looking in her eyes I could see that she had been doing her own share of drinking. I guessed she was almost as gone as me. I walked to her door and asked her, "What's up sis?"