OK brief history. My fiancé used to flirt and go on webchats to get off and watch women get off. He used to flirt with people from work. I stupidly gave him chance after chance. He's been fine for ages as far as I know but now I just heard a flirty conversation on the phone, it was about work but it to me sounded flirty. He went to London for a conference but didn't tell me she was there too. So now when I asked him if I have anything to worry about he bites my head off. Do you think he's lying just be what you've read here?