Harding's Wife

Harding's wife comes to visit him at the library. Harding calls McMurphy over to meet his wife and they all sit together and talk. after Vera leaves Harding asks McMurphy what he thought of her. McMurphy comments on her physical traits but then gets angry when he is asked more. then he yells at all the patients for what seems to be no reason. What could a possible reason be that he flips out at all of the patients? Do you think Harding's wife had anything to do with his anger?