being discovered, while playing with self bondage, by a young girl, who gets a few of her other friends, who keep me bound and use me for their own pleasure, video taped being humiliated and made to be their sex toy for an extended time, eventually being discovered by one their mothers and being taken away from the girls, only to be used by the mother and a group of her friends until they finally tire of me.

more like a paragraph than a single sentence, but it's hard to describe a #1 fantasy, without going into some detail