Is my husband Dr Trask being faithful to me? How do I know?

I think we need a little more info please! We aren't phychic. Why are you asking this question here? Has he done things that concern you? You must suspect something, or you wouldn't have asked. Have you spoken to him about your concerns? We need more details in order to try and give you any advice on your question. One thing that did catch my attention, was the communication between you and your husband doesn't seem to be good.

Without you being too specific, I can say that a wife usually can tell when a husband is lying, even if she can't exactly pinpoint what he's saying/doing that is false.

One day, calmly over coffee, just ask him straight up and without anger, "Is the affair still going on?" Watch him very carefully. Try not to let it turn into a fight, the point here is to engage YOUR knowledge of him to determine if he's making stuff up on the spot, or not. I would suggest if he goes immediately to angry/furious/deflecting... you have something to worry about. If he stays on confused/concerned/comforting longer, maybe not so much.

You know him better than we do, so use that.