My professional experience is limited to helping host foot parties. Most of the men there are probably married. I get that sense anyway. It doesn't cross my mind as being a concern because it isn't any of my business. They get play. I get pay. Everyone walks away happy. In my personal life, I'd have a problem with a partner lying to me. Once trust is broken, it is nearly impossible to regain. But, I don't carry that judgement into a paid gig. It isn't my place.