Screwing Around At Work

I know you think that just because of my job I am some easy slut or something, but nothing can be farther from the truth. In fact, I have only been with a couple of guys my entire life. That is not bad considering high school and three years in college. I get paid well to talk dirty, but it is just pretend. The guys that call like it and I like the money. So, when my boss asked me to come into his office (his bedroom since we work out of his apt) last night I was surprised when he came onto me. I don't think I gave him any signals that would suggest anything other than a working relationship. Somehow he got the wrong idea I guess. Maybe he figured that since I talked like a slut on the phone all night I was one in real life. When I want into his office/br he asked me to sit down on the edge of the bed. He then came over and sat beside me and put his hand on my bare leg and asked me how I liked the job so far. I got up and walked out. Didn't say a word, just walked out and went back to my desk and put on my headphones. I don't know what will come of all this. I like the job now that I am used to it, but I am not some easy slut.
What should I do?