My best friend just accidentally revealed that my daughter isn't mine through a link to her AncestryDNA account.

I [31M] was going through my best friends phone,(38M) we're literally like brothers, I was using his phone to navigate through our town while we were driving. We were out drinking just a little bit and he was showing me the new phone he bought a few weeks ago, how big it was and all the cool shit it can do. I was looking through his home screen when I noticed the app AncestryDNA. I clicked on it and it took me to his AncestryDNA page. I noticed a link at the bottom and wasn't sure what it was or if it was a public link or a link only he could see. I clicked it and it was a complete DNA profile of my daughter. I'm confused so I try to read everything in the profile and it says she's his daughter. I go through the different tabs and it confirms she's his daughter. I'm in complete shock, she's my daughter, I'm her father. We have been raising her for the past 11 years and she's just a few months away from turning 12. I'm in complete shock and I don't say anything to him about it. Instead I just pretend like everything is fine and that I was just trying to navigate the shit hole town we live in. I get home and my wife greets me with a smile, not knowing what was going on. I was just acting normal like everything was fine but on the inside I was freaking out. I just went to bed without saying anything to her. I don't know how to handle this situation just yet. I have a huge feeling that my wife cheated on me and she's not telling me. I have no clue why my friend would keep this shit secret for so long. He knows me like the back of his hand and knows how important it is to me that my daughter is just as important to him as she is to me. I just don't understand why he would keep this from me. I don't know what to do right now.<br><br>EDIT; Wow, this blew up way faster than I thought it would. I will update this thread when I figure out the next plan of action, which is not right now. I'm in a state of disarray and just not ready to just confront them both. I know I have to do it eventually but I just can't right now. Yes, I am going to take a DNA test. I need evidence or facts before I try to confront them. I take everything I've typed here just as serious as a marriage. Yes, I admit, I'm a coward. I can't just take this seriously right now. I'm just trying to take this one step at a time. Slowly. Yes, I admit, I'm a coward.