The fact in this situation is that the guy who was staying at the girl's house "temporarily" had a previous relationship with her, or so he said, 2 years ago. Now when he was pursuing the married woman, he first said he hadn't been with the woman for 2 years..then let it slip that she wanted to know why they 'hadn't had sex for a while'... then admitted he'd had sex with her "two weeks ago". So the woman he's romancing on the phone sees the warning signs, but is so flattered and needy, she pushes it to the side & continues with the relationship. Eventually, after several ups, downs, silences, a couple of 'ending it sessions' then starting back up again, (an emotional roller coaster with him) she realizes what it really was. He was using the woman for a meal ticket while he fooled around with her on the side, throwing her crumbs so she'd want the cake later. In addition, he was somewhat manipulative. So now, this married lady who has left it behind and regained the validity of her marriage (she had never had an affair before) has struggled with whether to tell meal ticket lady what a cad he really is. You are right. She doesn't know what his relationship with the meal ticket woman was really like or if he's still staying there or not, he was very evasive about it. Though facts point to the possibility he's NOT there now but in a nearby city. Regardless, it's been a wild ride. My opinion? I say leave it all alone and hope that meal ticket lady finds out what a cad he is and dumps him, though he doesn't consider her a permanent fixture anyway. She may be clinging to hope alone.