Twinsequences Ivy

Three years ago I killed a man and did inconceivable things to anyone that stood in the way of my plan to ruin my twin sister's life. Things backfired, and I've been locked up in this nuthouse ever since.
Willow and Stoshua think I'm out of their lives for good. They've moved away and changed their identities to make it harder for me to find them. They assume their little family is safe from my reckoning.
But they're wrong...
This time I'll get it right.
This time her life will become mine.
I was born Ivy, but when I'm done you'll call me Willow.