Family Tree & DNA search

Long Story short version. I've always been into history and studied history at university, which started my interest in my family history. Doing the research, I found a branch of the family disappeared suddenly and no further mention of them after the Civil war, they had fought for the South. I tried everything to track them down and had no luck at all. Hence a DNA search and at first just relatives I already knew about. I started to think they were an extinct branch of the family. Then I got a match that was a possible relative of that branch. It was my studies partner and lover, we done most of the same courses together except history. But her seeing me putting together a family tree and her not having much knowledge of her family more a few generations back got her interested in finding more. As it turned out there wasn't any direct male line left after the Civil war only the female line. We've been lovers since starting at university and are several generations passed being an incestuous relationship. Not that would change my mind about fucking her as I really love our sexual relationship. But she has now a full family tree as far back as we can go the early 1700's.