I believe that no married man will toast a married woman with out the permission of the woman.
What do u discuss with your boss? Do u admire him? Do u request for credit or lunch from him? Does he take you home or drop u off after work? Do you discuss family matter with him?
You are the one that is making the approach by your body language.
In my office I do see how these married women who claim to be harassed are approaching guys, admiring them, asking them to buy lunch for them. Using your phone to make calls etc.
If u are married why not have a limit to what u do in the office.