I was in the process of getting very jealous and frustrated about a recently moved in girlfriend 10 years ago who I found frequently chatting with other guys on the net ( at that time, AOL). We had a big blow out about it, and she packed one suitcase and did not come back that night. I called her the next morning asking where she went, and she said, I'm staying at my ex's house just two blocks away. His girlfriend is gone for the week and I'll be here until Friday. We met for drinks that weekend to patch things up, and I asked her about her staying over there with her Ex, and she just replied," Oh he has a girlfriend." and left it at that. It gnawed at me and I brought it up again a few days later. The next afternoon, I came back home and she was sitting in my living room with a good looking guy who I had never seen or met before. She introduced him as Dan, her old boyfriend and my neighbor, saying she thought I should meet him. It was pretty uncomfortable. She indicated that his friend was a travel agent who was out of town every together week for 4 days at a time and that she would be staying over there with him while she was gone, and hoped that I could understand without getting angry. When he stood up to leave, extending his hand for a handshake, all I could notice was the big lump in his shorts. later that night, she and I were drinking quite a bit and I told her how I thought her bringing that guy over to my home was really out of line, and she responded that she really loved the size of his cock ad it should not be too big of a deal if she fucked him now and then when she wanted to without me getting all bent out of shape, because she only got thoroughly excited by and satisfied sexually with package of his size.. I finally broke up with her after a couple of months of feeling totally used and humiliated by the situation. When she would return from her 3 night stays with him, she would intentionally shave to make sure I saw her very puffed out reddened vag lips.