While they were making out, he took her hand and shoved it into his pants so she could feel how hard she was making him. When she told me that part, I...asked her, “Was he bigger than me?”The way she said, “Oh, yes!” told me everything I needed to know. Because I knew that I was bigger than the only man who’d been inside her, he was going to be fucking her with a bigger cock than she’d ever had before. That meant he’d be stretching her and filling her in new ways and touching spots I couldn’t. "You didn't used to have all this hair."I turned to leave, but my sister said, "No, we're not finished yet." She sat down on the toilet lid for a closer look, put her hands on my hips, and positioned me to stand right in front of her. "This is truly amazing," she said. "Boys' bodies are so strange." I'm glad you think so."She began to feel one of my testicles. "This is where you make sperm cells and testosteron-e," she said pronouncing the last "e" as a syllable."It's testosterone," I. Dick just watched this for a few moments, and then gently guided Christina into a different position from which she could use her hands on his cock, but still enjoy the tongue job I was giving her – and he could enjoy a full view of everything. With both of his hands now free, he focused his attention on my breasts, first kneading them gently and then pinching my nipples so firmly that I had no choice but to attack Christina’s pussy with renewed enthusiasm. Christina was on the verge of a. Richard took me by the hand and I asked him, "What did we get ourselves into?" I'm not sure, but let's go in...see what's happening."We walked through two heavy wooden doors into a great room that had apparently been cleared for the gathering. There were only a few couples, and I was puzzled as to why there was so much wait staff and security people. Most of the guests were in formal attire, and I felt really out of place dressed as I was, and Riichard was only wearing a sports coat. A waiter.