What percentage of girls who go out on dates with ex-partners ends up having...

[CARLOS F]

...sex with the ex? I found out after 8 months with my gf that she was all that while keeping very close contact with her ex-bf (with whom she dated for 1 1/2 years and broke up about 2 months before we got together). Such close contact included hot online chatting with explicit sexual conversations between them (not to a point of actual cyber-sex, more on sharing their sex lives after they broke up and mentioning what they use to do in bed before), on daily basis. Also many phone calls every day. And from what I found out in hard evidence (MSN chat logs), they went out on dates (mentions to dinner at restaurant and to drinking at pubs) on at least 3 occasions behind my back. I confronted her with the evidences, and told her I feel absolutely cheated on by her and her ex, and that I was considering breaking up with her. She confessed a few wrongdoings, namely lying to me that she had cut off contact with him, and that I was totally right that their conversations were absolutely innapropriate for someone who's on a committed relationship. She begged me for forgiveness, and promised to put an end to all contacts with him once and for all. About the 3 dates, she says that in one of the cases I caught their conversation setting up the date, they actually aborted the meeting and never went out. She reckoned that on the other 2 times they really went out, one to a restaurant and another to a pub, and she swears very firmly that on both encounters they have had absolutely no physical contact at all - she says not even a small peck on the face as greeting or as goodbye, and all they did those 2 times was sit down and eat and drink at the same table but far from each other, no hands touching, just having small talks to clear up their heads. She swears on the life of her daugther that she has never ever had sex with another man since we are together. She kind of reckons having emotionally cheated, and works hard to diminish the relevance of it trying to make it easier for me to forgive. And though I cannot believe that they did not have sex - in light of the evidences I have - she really looks very convincing when she states her points trying to make her version of the events stick. Anyway, the lies and the sex talks between them are already bad enough for me, and if they had sex or not for real it will make little difference in the amount of pain I am going through. I made up my mind that I will not break up with her now, and will try to forgive the cheating and get over it, for I love this girl as never loved anyone before in my life. Maybe a wrong call, but I will take the chance. Obviously I will keep my eyes wide open and if her promises of changing behavior are broken, then there will be no other option but to leave her. I told this long story just as a background to why I am asking this question: "What percentage of girls who go out on dates with ex-partners ends up having sex with the ex?". Thanks for your inputs! Cheers.