Guys like to flirt. Women do too It is human nature.
It depends on how far they are willing to take it. Me, I could not picture myself looking in the mirror the next morning without feeling shame for the hour of pleasure I might have. (yes I said an hour :)) Another thing I have seen in those who have cheated, it does not matter where it happened, next door or another country, it always seems to find its way home. My wife was 1200 miles away and I found out. Another reason I won't ever take that chance.
You have a tough situation in that. I don't know your husband.