Did I do the right thing?

I did something today I'm not proud of, but it had to be done. I called CPS on my cousin and her POS baby daddy. He has been physically and mentally abusing her for 10 years. She has left and gone back many of times and he's progressively gotten more abusive every time. It's to a point now where he's threatening her life, some of the family, and even posting videos on Snapchat telling someone "to come find him" and showing his guns sitting out on the porch. He finally threatened her life yesterday and I couldn't take it anymore. Their 3 year old went to daycare today and said "daddy kicked dents in mommy's car. Daddy hurt mommy." He's now retaining the things he does to her. He cheats on her, puts their children in danger, does drugs, and excessively drinks it's honestly hard to tell what that poor child has seen. I didn't do it to help her get away from him I did it to get those children out of danger if something happened to them and I didn't do anything to potentially help I'd never forgive myself. I just honestly hope this is the wake up call she needs to leave him....