For this idea, I would be perhaps happily married, or wealthy. Someone who I could have known, or that see's me and envies me my life, aquires a spell, or some reality warping technology that allows them to alter reality.
Going to bed one night, I wake up in the morning to find that I'm a BDSM lesbian porn star, or the bound slavegirl of the one who had reality shifted. Ive read about the reality warping theme in stories, and thought that it would apply here to this idea
If this appeals to anyone, or if you want more information, please let me know.