The two women I asked to participate as supplement testers were a pure, gentle-looking older sister and a slightly sexy younger sister. I later discovered they were actually sisters, which made things even more intriguing. After giving them the supplement, I revealed my erect cock—and surprisingly, the prim older sister was the first to completely give in, dripping wet with arousal. From there, things escalated quickly; the younger sister also gradually succumbed, and before long, both sisters were fully immersed in a wildly horny, intense threesome.