Hi Bombs. I'm prob the last person to give advice now, as I'm going through similar stuff.
Like Steve said, be very careful regarding the 'abuse'. Maybe get some type of voice activated recorder, and have it on you when you're alone with her. I'm no lawyer, but I've had friends who's wives filed a bogus abuse charge against them, and they were ordered to leave the house.
It is heartbreaking, and amazing that so many women (and a lot of men) will completely destroy the lives of everyone around them in order to be 'happy'. It's the height of selfishness and immaturity, but unfortunately that seems to be the society we live in now.
Married: 15yrs Ages: Me 49, W 44 Kids: S12 BD: around 4/14