I am the OP and am going to clarify the original post because in trying to keep to the letter limit, the tenses got confusing. I originally dated the brother "A" for a month and half. He has a very common last name. After we finally slept together he immediately went missing, which happened to be before I could meet a large portion of his family. Now 6 months later on a different blind date with brother "B" we were talking about respective families. Almost immediately the stories started to ring very familiar. He was telling a story about his brother who worked for him and it became abundantly clear that I had heard the same story only from a different perspective. Since there is a yuck factor with dating brothers and I am not really into creating family drama needlessly I am bowing out.