Mom got to work on her drink with glorious abandon, while I sat back and surveyed the crowd. The population of the room sure hadn’t dropped since we...arrived and it sure was getting hot in here. I pulled off my sweat soaked suit jacket and hung it on the back of my chair. Then I unbuttoned the vest but kept it on for the moment. All the while I continued to survey the room. Most of the crowd was young and collegiate in age. It was definitely a disco crowd, not the usual redneck blue-collar type. I was still lying on my bed fantasising about my step sisters crotch and developing a hard on, when I heard her call my name, i got such a fright that my dick instantly went limp as I thought that I was alone in the house and that she had gone with our parents to town. She called my name louder this time and when i answered her she said that i must come to her room immediately!When i got her room she was lying on her bed with her short floral dress on and her legs crossed. She told me to come. We were touching each other up, slipped on our shoes, and the doorbell rang. It was 6:20, Jenn said, "That's mine, see you later kiddo - I can't wait to meet your guy."She left me alone and I fiddled with the straps of my gown for a couple more minutes and the doorbell rang again and I went to the top of the stairs. I heard some whistles from below and started downstairs. My breasts actually jiggled as I walked, which made me feel quite sexy.Joseph stood there waiting for me, as my Dad. Brian didn't want to leave the library and left only after Margot promised that he could return after she showed everyone where the bedrooms were. We went up to the second level to find a long corridor wide enough to set up six bowling alleys. Margot opened five doors, allowing us to select the room that we preferred. When we were finished with the quick tour, she suggested "Why don't you bring up your luggage and relax until dinner. If you get hungry before then, please fix something.