Monster- in-laws

Sorry for the long post, rant over...Ok, so how many of you all get along with your monster-in-laws or shall I say mother-in-laws? I am out of options and I don't know what to do anymore. My husband is the only boy, so he is a momma boy. Before we got married he was paying all of her bills, taking his money to so say pay his car insurance/cell phone bill every week (he was to blind to see) even though his cell phone was getting disconnected and he started getting flags for uninsured motorist. He still didn't question her(so sad) so I put a stop to it. From the beginning his mom and sisters would invite x-girlfriend over while I was in the presence (I know you can't choose friends, but it's a difference when you are being spiteful) fast forward to being together for a total 5years, out of the 5 married for almost 3years in 4mths, death of our first child and I don't even talk to his mom. It is so bad, she texted him last weekend saying "son you need to come back home if you stay over there you will not prosper and you deserve an honest and true love" His family is mad that he defended me in a heated argument. So by any means they want him to leave me. Now a week later he is still over here. I don't know if I should be happy he never left me or should I be worried he never told her anything back? He listens to anything she says. I just want my husband to don't fall victim to his mom horrible ways and believe her bullshit. Also every time my husband and I argue he threatens to go sleep to his mom, even told me when he went to his mom for 8 days that was the happiest he had ever been in a long while, I took him back after those harsh words 😞 He on the other hand is very disrespectful at times and his word choice is not so good either. He wants to stay out every weekend until 5/6am drinking, and lord knows what else and when I bitch about it or bring it up, he threatens to go to his mom and says he does not like a person who naggs all the time. WTF? I don't know if he trying to please his mom and cause me hell, but I am miserable and starting to seek options for a possible divorce. I tell him to leave EVERYDAY, but he refuses. He then says he is not happy no where else but with me and he loves me. (I know confusing as hell) Any tips, opinions, advice are welcomed. I need to know how to deal with his mom because she is the one who has a big part in my marriage🙄I don't go over there..HELP