Thats about it really. He has not been physically abusive (has been in the past) but he has been verbally abusive in front of the DC over the last 48 hours (and the last 4 years, but if I started a thread on that it would be pages long)
I have finally plucked up the courage to ask him to leave, so he has spent the last couple of days on a major offensive, shouting that he thinks I am horrible, mental, pathetic, breaking up the family, taking his kids away from him, telling lies about him. While I was out if the room this morning he read a text to me from my worried sister and practically combusted with rage. He follows me around the house desperately trying to get a reaction and seems incapable to modify his behaviour in front of the DC, he is refusing to acknowledge that he is scaring our 4 and 2 year old.
DD said to me when we were cowering together "Did daddy just say you were horrible mummy?" 
Anyway at that point I though fuck this, and have gone to my mums. I am scared of him, but he is refusing to budge, even though DD has school in the morning because he is a narcissistic tosser as he put it "I am not fucking going anywhere as I pay for this house!!"
What the hell do I do to get him to go? We have no large scary men in our family to help, before anyone suggests that!