I couldn't disagree with Bred more. Going behind her back and obtaining records of her calls and text messages is not the way to solve anything. It would be more appropriate and quite frankly, more productive, to sit your wife down and explain to her exactly how you feel. Explain to her your discomfort in her going out clubbing and your suspicions in her fidelity as a result. (Do so in non-aggressive non-accusatory manner otherwise this could turn into World War III.) If you get no feedback from her or are unsatisfied with her response, I would suggest seeking out marriage counseling. A certified marriage counselor, who has no vested interest in either party, may be able to shed some light on the situation and help you and your wife communicate more effectively and come up with a better understanding of the circumstances. I hope this helps.