Hmmm...well kunstler, I have waited for the rest of your story before responding, and you haven't been back for over a week, so I'm just gonna go ahead and respond now....
There are so many things "wrong" with your affair, which are red flags in any relationship. Even if you had met this woman while you were single, I would say the same thing: the age difference and the fact that she says "she can f*ck anyone she wants, but she wants to f*ck" you are actually both red flags. I know you have interpreted them to be assets to her, and reasons why you were interested in her to begin with. But these two things actually spell disaster for you.
If you are still around, I'd be happy to continue this discussion to see if there is any way to help your situation.
