A: I never expected that Bob would feel offended.

B: He is usually a good sport, but this time he didn’t seem to appreciate your joke. In fact, you should not have joked about his wife.

Note: A good sport is “someone who can accept a loss in a competition or can accept being the butt of a joke.” This phrase, of American origin, comes from the idea of “sportsmanship,” which includes such qualities as fairness, respect for one’s opponent and graciousness in winning or losing.