I met my gf at an online camsite. She was married at the time and lived across the country. Shortly after we started talking she moved close to me and eventually moved in with me. My stepson occasionally cams on the same site and one night she saw him and just  wanted him. We would have sex and talk fantasy about her fucking him. I was having problems holding an erection for long and I knew it was dissapointing her but the sex talk made her excited. One day after speaking to my stepson I had mentioned to her that I shared some of her pictures with him and he would come fuck her if she agreed. This made her hot but it was agreed that if I let this happen it would be by my direction. I told her to email him but I wanted to be informed on everything. After a few emails I told her to stop and she agreed.  She decieved me though and the emails continued with them and they both talked about humiliating me and making me her bitch. When I found out they were still emailing and saw the things she was saying about my failures as a man I was hurt. She promised never to email him again. I found out that was a lie as she continued to email him sending him pictures and videos of herself and of her and I. I was able to get control of his email after finding out that she even skype cammed for him and I started pretending I was him without her knowledge. I wanted to see how far she would go. If I had not intervened she would have left me for him I found out. When I finally admitted to her that it was me in the latter part of her mails to him she was furious and blamed me for the whole online affair she was having. She feels no guilt and has since left me and went back to her home state. I have tried everything I could to keep her here or get her back with me. She says she wants to come back but has taken no action even after I have offered to drive across country and bring her back. I still love her like I have loved no other but am I being stupid? I don't know what to do I even offered her the dominate role in our relationship which she is glad to take. At this point I am hurt and confused and feel worthless.