Broken Boulder so it seems i'm someone i've never met

Lanawyn hesitated, and suddenly he was rooted to the spot. He searched her expression and found it blank— lacking. It was true, then; he had become his father— or that was how he took it, anyway. All at once he was certain that he had failed. His mother's attention, her effort, had been for nothing. She had done her best to ensure that he would not become this; that he would not become the man whose head he had wrenched from the still-warm body. And he had done it anyway.
But maybe— maybe that was it. Maybe he had become his father the moment he felt flesh between his teeth. Maybe it was inevitable. The boy swallowed hard and tried not to break further, only hearing his sister's words as if from a distance. Cursed... He repeated under his breath; he didn't even notice that she was against him, now, head tucked under his chin. For all his mother's warnings...
No— we are the curse.