My older sister was at sixteen, already a world-class sadist, who delighted in playing rigorous 'tying-up' games, with me, and sometimes her best-friend. I was twelve at the time, already prone to budding erections, and blessed, (or cursed) with an exceptionally large male organ! This fascinated them, and they played with it incessantly, every chance they got. Our mother was an invalid, and my sister, mature for sixteen, pretty much ran the household, with an iron fist! When I complained loudly about cramps, with rope, she get inventive, and made one of her older parkas into a hooded strait-jacket. "This way we don't have to look at your stupid face anymore!" she giggled nastily, while sentencing me to blackness, and difficulty of breathing, tightly hooded as I was so long, and so often, while they tormented my fully-erect cock, and swollen balls, unhindered, unseen, until I was begging for the release of orgasm, which I had been introduced to, by then, and denied mostly! These witches loved to see me squirm and moan and groan, and beg and plead! By the time was fourteen, and she was eighteen, things had moved along, she used contraception, and mounted me often and endlessly, turning her activities into semi-consensual but highly illegal "r**e". I know I was totally addicted to her, and whatever she chose to do with me, by then, and utterly unready to complain in any shape or form. She seemed attractive to me, but she wore glasses, and boys didn't care for her much - maybe she was too bossy for them - and she just didn't date! She did enjoy a far superior sex-life though, what with being able to dictate and control the action, to suit her every whim. Then she discovered tongue-clit contact, and that was her activity of choice from then on! So the parka/strait-jacket was reversed, back to normal, and the hood now left enough space for my tongue to do its rigorously-trained work, on demand! I experienced every possible humiliation, and different version of a similar confinement, as the months turned into years, and suddenly I was eighteen, our mother passed away, we sold the house and moved to an isolated rural place, and lived as husband and wife from then on, our inheritance being pretty substantial! I was a stay-at-home 'husband' and she went to work, and we discovered the delights of full-body latex confinement, which allowed me to do all the housework, while she was at work, and still allowed her to have whatever she wanted from me, on return. There will be no children, obviously, and neither of us care, really. That brings us up to date.......