My mom didn't pack as much as I figured she would. All she brought was a carry on bag. I told her it would be hot and hoped she brought her bathing su...t for the hotel pool. She smiled and said of course she did. We got to the airport a little late so we rushed on the plane and were in the air in no time. My mom sat next to the window and I was the only one next to her. We were flying above the city and she asked if I wanted to lean over her to have a look. I leaned over her and we were both. Her hand was softly cupping my balls as she slid her sweet lips upward to once again circle my pulsating cock head. Pre-cum was oozing from my cock as I watched my sexy sister slowly part those sexy red lips and flick her tongue out to taste it. A string of pre-cum stuck to her tongue as she pulled it into her mouth and savored the salty taste. I observed her beautiful face closely as she moved toward my cock again. The smooth lines of her jaw bone, her nostrils flaring slightly as she. .. as graduate students we were assigned teaching classes ... Sally sat on the podium with us and teased the male students. We spent lots of money on the wench ... we dressed her in a sophisticated slut style ... she enjoyed it immensely.We did have problems with some of the males ... and a few females ... who admired Sally from a distance ... and not so distant ... and even pretty damn close. There were those who weren't willing to remain, just friends ... not that any of them were .... I pulled them up, with my now rock-hard girl cock peeking out the side. I put on the pretty necklace and matching bracelet I had picked out and placed rings on my fingers. I twirled around and admired my perky ass-cheeks embraced by the wispy thin panty bottom. I could go no further for a while. I knew that if I didn’t do something soon, I would never be able to put the rest of my clothing on without ruining it.I stood in front of the full-length mirror, amazed at the incredibly sexy girl.