We were kids, just kids.
There wouldn't be any more of us after Rabbit, but we didn't know that then. Mother and father were intent on a big family, one of those noisy clans that threatens to burst from its pew, one where for all intents and purposes the older children raise the younger. Rabbit changed their minds. About having a lot more kids, then about having any more, then about staying married to each other.
Whether something evil was born into her, or something good was left out, it wasn't her fault, not really. It's never a baby's fault.