"We were separated," she said logically, "because our parents couldn't keep us, and they found the best homes they could for us. Why does it have to be about you, Simon? Why can't it just be about them? My adoptive parents wouldn't have taken two children; they already had a houseful. It doesn't need to be about you."
She let him pull away, and she didn't fight him on it. She hugged her arms around her stomach once he'd moved, and she looked at him clearly. "You can't control your temper. I can kill people. We aren't normal, Casper, no. But we can learn to control our impulses. You can learn to control your impulses."