We shared the bathtub as youngsters and even then my older sister was endlessly fascinated with my cock, and more specifically, controlling me through my cock, by grabbing it, pinching it, and manipulating it so that I would do whatever she wants. Over the years as we became older, her fascination became an obsession as she mastered the fine art of teasing, manipulating, massage and control, all through my cock. Whatever she wanted, she could get. I use the term “my” loosely here as my sister says she now owns my cock. She will come into my room and edge me to the brink of orgasm for hours on end, until she, and only she, decides if, how or when to release me from her torment. I guess I would call it a kind of sweet agony, a sensual torture of sorts. Does that make sense? Whether she is doing it out of love or contempt, one thing is clear: I am nothing more than her little play thing to toy with as she pleases. Her current favorite trick is to suddenly interrupt or ruin my orgasm. She seems to really get a kick out of spoiling my day. Yes, I’m pretty sure she takes a kind of cruel satisfaction in her powers, but she knows I’m really no position to resist.