As a career manager and executive who's on occasion been called upon to clean up the aftermath of workplace affairs gone wrong, my advice to you is to be very careful, especially if the person you're screwing has psychological problems, as you seem to be pointing out. At very least, if she causes a stink because it ends badly, you could very well lose your job. I've seen these dalliances destroy careers, marriages, and reputations. I'm sure there were also plenty I didn't know about that went just fine. I would never do it, but that's just me. It's amazing to me what people are willing to risk for an orgasm...