Can u believe nothing happened

Hi I've been married for 13Y and last year my wife had a male friend that always came to our house and we hung out together but after a couple of months I became clear to me that he was looking for something more from her then friendship and after a nite when the 2 off then when missing together( not picking up there phones or replying to tex), I demanded she ends the friendship and thy did so I was to believe but a couple of weeks later I was told thy when to the bitch that nite and talked but" NOTHING HAPPEND" but I remember that nite she just came in and took a shower @ 4 in the morning which is completely out of norm and all under ware was washed immediately there after. Now ever time she want to get intimate I can't help but think back to that nite and if thy had sex or not and Ill make any exc not to have sex. can't get the image out of my head or am I just crazy and nothing happened

Sorry not when to the female dog but to the sea side

It just seems strange to me that she did not answer her phone and then to come home and shower at 4am why would you act like you had done something wrong if you hadnt