That would be because I am adopted, which would make Lelahai technically also a stepsister. And trust me, she has a pretty face, but her insides make the Archdemon look like a sodding saint.
We were raised together, and thus were very competitive.... she could never stand for me to have something she could not. A comb, a book, a man - it didn't matter what it was. I was the same way, though, so I can hardly say I'm blameless.