A couple of weeks ago I found out - concrete, irrefutable proof found out - that a close friend of mine has been cheating on his wife, regularly sleeping with someone else. He told me that she had some issues in her past that meant she didn't ever want sex and that that part of their relationship was over several years ago. He begged me not to tell her, saying that it was just for sex and he loved her but it was the one part of their relationship missing, blah.
I found out this evening that she's pregnant. Which means the "it's just because we don't have that part in our relationship" was utter bollocks. I feel sick (she is a friend too, though I don't know her as well). I want to call him and have it out with him right now but I know I can't. I'm seeing him tomorrow on a work-related thing and don't think I'll even be able to look at him.
Someone please help me, I don't know what to do :( part of me thinks she should know, because he's done this before and will certainly continue if I don't say something, but I honestly don't know what's for the best :( can someone please tell me what to do? Because I could just weep for her :(