Wow SkyWhite, you truly amaze me!
My mom is the monster in my life too, and unfortunately, she's still alive. I don't feel the least bit guilty for feeling that way, either.
I was 40 years old before I told anyone, though many people knew there was something 'not quite right' about her. Part of the reason I kept quiet for so long was abject terror that this time she really would kill me, but a bigger part of the reason was that by telling someone, it made it all real - every single living nightmare becomes real. Once the truth comes out, it becomes impossible to ignore it any more.
I think you're doing great! Keep it up!