One afternoon when one of her teammates was over I was in my bedroom ignoring them, doing homework when Sis knocked on the door."I know you've been in...erested in what Bob and I are doing," she said, "but you're too young. But I'll help you get started if you'll model for my friend."Sis explained that I would come to her room and get naked so she could show off the various parts of my male anatomy and generally let the girl learn about boys from me.I was curious enough to agree, so we went to. "OOOOOOOOOHHHHHHH..."The salty torrent of jizz blew up from his balls, cascading onto the roof of the sucking aunt's mouth, squirting hotly down her throat. The size of his cum-load gave ample testimony to how long Billy had held it in his balls. It was huge... a shower of thick, creamy sperm that almost choked her, but Debby was expecting it and swallowed noisily, eagerly gulping down the boy's considerable load.Hungrily, Aunt Debby sucked her nephew's juice-shooting prick, swallowing rapidly. Now they were both laughing at me…. mercilessly. I looked up at the digital clock on the bench: 7:36pm. One minute. ‘Minute man!’ Antonio laughed. ‘Dude! I think its safe to say that you lost!’ he said laughing some more. Before I could say anything, I was pulled off her and tossed aside. ‘Now watch and see a woman’s reaction to a real cock!’ As soon as he unzipped his pants, I knew. I knew why she’d been cheating on me. Compared to Antonio, I looked like an infant. Clearly, I was not at all. The way my cock was getting hard, harder than in recent memory, I would have hurt myself.She stood up coming close to me and reached down taking my cock in her hand stroking it slowly. I sat back, closed my eyes slightly and enjoyed the delightful feeling, glimpsing occasionally at the top of her dress, and the soft round breasts just under her dress. All too soon she let go of my cock and stood in front of me rubbing her crotch again. She slipped her hand under the panties, provoking me grasp.