Expert: Don - 9/13/2007

Question
We've been dating for 6mo.  I saw a call from a guy I didn't recognize, no big deal.  I went in her phone for something later and found she was calling this guy pretty regularly.  One weekend I couldn't get in touch b/c "her phone died, etc."  Next week I found a receipt for a flight to NYC.  This guy has an NYC #.  Confronted her, says she booked the trip and didn't go, etc.  Checked with American Airlines, they said she did go.  Confronted, said she went with her friend, only person she knows in NYC.  I said what about this guy, she said, Ok, he met them there, hung out, nothing else.  I had to move b/c of business, and I've been hesitant about continuing on with things.  She said she stopped talking to him, I actually believe this part.  
Recently, created a chat name, went online and found this guy.  Talks about a girl he stopped seeing recently after 8mo, came from Miami to see same show she disappear for, slept with her on multiple occasions, his page has a video of him and her at same party, etc.

So now it's rock solid that all this happened.  I'm going to confront her but I would like her to tell me the truth, not just explain what I already know.  Should I just tell her she has one chance to tell me the whole truth or it's over, would this work?

I've done the same thing a few times before, I understand it.  If she doesn't come clean, I'm not going to take her back.  What is the best approach for getting her to come clean with me.

Thanks.  

Answer
She might never tell the truth, every other time you've confronted her even when you had evidence, she has come up with some kind of lie. So it might be just that she refuses to tell the truth.

If I were you I would give her the ultimatum, tell her this is her last chance, you want the whole truth or it's over. Then it's up to her if she lies again, then you know she just likes to lie and she'll never give you the truth.