I have had confrontations with four of my husband’s APs.
AP #3 - she showed up while my husband was at work (he was a musician) and I was there.  I told her to leave, she wanted to stay.  It was not a calm conversation.  The stage was set up with a window into the lobby, and WH could see the two of us talking while he was on stage.  I "persuaded" her to never come back.
AP # 5 - she was honest when we spoke. She answered all of my questions, cried, apologized multiple times.  She had been an acquaintance, and told me a lot about herself in the conversation we had.  I left that conversation feeling better, in that I knew he wasn’t lying about what they had done together, and some details.  
AP #6 - she lied, pretending to be"not remember anything like that ever happening".  This was a very close friend for 20 years.  Not anymore.
AP #7 - what a mess. This was a long distance EA.  She told me SHE was the one who was hurt, I wasn’t hurt.  She said she wanted my family and my life and my kids.  She said my husband was the only person who ever understood her, and she felt a terrible loss because now she lost him as a friend, and now I wasn’t her friend anymore either, and she wouldn’t be able to talk to my kids anymore (she was a family friend for nearly 50 years).  Then she lied and said she wouldn’t have had sex anyway, that she had "turned lesbian" (a lie).  She told a number of lies that I knew were lies, based on emails and texts I had seen.  
So, based on my personal experiences, I would say DON’T BOTHER.  They are liars for the most part, and have no morals and no compunction to do you any favors.