How old was she when you adopted her? Did she have chaotic early years? Was she in an orphanage?
I know this is hard, but you need to rehome the pets. We adopted a boy who abused and killed our pets, although in front of us he acted so loving toward them that it never crossed our mind that he would do this. He also molested our two youngest kids. I hope you have no other kids.
Frankly, she sounds dangerous. Is it maybe best for her to live with her father? Harming snimals is a very dangerous symptom of a huge problem. We had to undo our adoption. Child was way too dangerous for a family setting. I wish we had acted before the eorst had happened, but he had alwayd been so charming to us and all adults. It was children and animals he preyed on.
If you are scared, she probably should not live with you and the furbabies. No reason to be scared in your own home.