Cheating is a matter of definition. My personal definition is "my dick enters her body", so i have never cheated.
I doubt she would see it that way though. I have had multiple women play with my dick, sometimes for pay, sometimes for free. I let them, and I don't consider it cheating any more than I would consider jacking off cheating. Then again, I'm scum, so take that for what it is worth.

Its interesting most AMPs i go to all have the same smell to them. Is it the oil/lube they use? Anyone else experience that?