It had gotten to a point where he actually didn’t even try anymore, and was seemingly content with our heavy-petting. A few more months passed when...my parents announced to my sister and I over dinner that they were going to take an anniversary trip to the city the upcoming weekend. They were going to leave me and my sister alone, however, with daily phone check-ins. The moment their words left their lips, I realized that I was perhaps ready, and my mind sprang into action as I began to. It was at times pretty hard to tell who was who, there were shemales, transsexuals, twinks, lesbians, bull dykes and a couple of members of the Dykes on Bikes that were down right scary in their full colors. An occasional hand brushed against his crotch as the owner of the hand walked by. Several individuals tried to chat him up, and tried to be as responsive as possible with out getting embarrassed. Many of the patrons were dressed as he and Tilly were, that is their sex plainly visible. We followed Shirley’s soft moans into the master bedroom, where she lay tied to bed. I stopped short, taking in her beauty. She stood on the floor in a pair of strappy red sandals, with her hands tied to the bedposts. Her beautiful, round ass wiggled as she heard Bill step into the room. Her long, dark hair cascaded across her back, and her soft pussy winked at me as she moved her hips. I was instantly rock hard, my erection bulging out the front of my sweatpants. Bill had started music. She gestured impatiently for me to stand. "Girls ride the bus every day and nothing happens to them, you know!" That's the operative word here," I said. "Girls - something I'm not. Wearing female clothing I'm liable to get myself beaten up if I'm not careful." So I guess you'd better be careful, hadn't you?"Lisa giggled at her own answer. I knew she was having her petty revenge for us having to sell the second car she had used before I lost my job as a shipping comptroller. She had taken that.