`Conversation picked up once more, and Emily joined in with more enthusiasm this time. I kind of just ate my breakfast while I listened in and studied each of my sisters, wondering how I'd become so lucky and worrying about what the hell I was going to do next. Mel had given me a taste of what it felt like to be with her. And I guessed it would be a similar experience with each of them if she was right about this whole genetic thing. But did it make it right to bed my sisters if this were purely a scientific thing? It was like something out of our...