Just got this idea and thought I would post and see if anyone bites. I might even do it over IM .. who knows.
The central character (yours) is a female mature celebrity, age probably ranging from early 30s onwards. The thing is that she has some kinky fetishes. She's either married or single but loves to play with young boys/teens (site limit) and generally dominates them and not really in a BDSM manner. Her secret life has been safe for a long time until someone starts to blackmail her. It could very well be her current boytoy.
So the blackmailer would take control, make her do things but would actually turn her to a switch, humiliating her, taking control of her but also sometimes letting her play as before. I am actually pretty open here on a multitude of different factors. So lets discuss what the exact detail might be if any of you are interested.