It IS the right thing to ask questions... have you read MWD?
ASK QUESTIONS!!!!
If he is reluctant to offer full disclosure and to keep CLEAR of her then I would be very suspicious.
Men in particular will use defensiveness as a control mechanism to maintain their affair. You ask a question and they get angry so the female quiets up to keep the male happy...
The end result is that the male is happy and the female is not.
