My wife cheating me

Hello Sir, I am an engineer of 40 years and my wife is 37 years old and we get married 9 years back (kind of love marriage). I works in Mumbai and my wife lives in (house wife) Pune with my 8 years old son and my father. I come to Pune every alternate weekend. Everything was perfect and fine until 2 months ago, my one of uncle having same age (bad character image but he lives in Lucknow) has been calling frequently to my wife on her personal mobile number. During initial periods, my wife was not picking the phone but after sometime she started picking the calls. Now she hides the calls from me and delete all the call logs before I come to home. I think she also deletes the WhatsApp messages. Because of this frequent calls, I became doubtful and decided to track the calls by somehow, now i get all the incoming and outgoing call details. Now what i see is that my uncle calls her at late night around 11 PM every day and they talk continuously more than hour and it became a routine for them. I am shocked, depressed, hurt, exploded in anger and not able to concentrate on work, it comes to my mind every time. I wanted to divorce her as I can’t see her face onward. Please help me on this.