Oh, that sucks. I generally dont get farther than the planet with the cows or the one that's basically a junkyard. I tend to turtle, and go very slow, either focusing on trying to get myself looking the way I want, or leveling myself as much as I can before I get board and move on finally.
I also didnt think I had a sister, since the BBEG introduced at the start is your Cousin and the intro character design etc etc makes it like you are a single child. I know banging a 1st / 2nd cousin is still incest.