Wtf can I do...HELP!

Becca

So I am almost 32 weeks pregnant and I left my oldest sons dad almost 2.5 years ago and me and my son moved in with my boyfriend (to escape the very toxic life from his father) about a year and a half ago. It started out amazing. After some time my son started to act out and it went from him doing what I asked and listen to fuck this I do what I want. Well it caused a lot of tension in the home (to be expected) well we live it day by day trying to make him understand the bad behavior is not ok and he needs to listen. He has admitted he doesn’t want me with my boyfriend and he wants it just me him and the baby. Well I told him I love josh and I’m never going back to his dad cuz he keeps saying he wants that and it’s not clicking. So this morning 5am my boyfriend gets up and goes to wake him up so he doesn’t pee his bed (started that up also) and when he got up some money fell off of him. Well at first my boyfriend was like did he take this from his grandma cuz he stayed the night with her and then my boyfriend checked his wallet and noticed his entire check (over $500) was missing AND his cellphone was locked out for 2 hours. We ask my son and his answer to everything is “idk” or “I didn’t do it” so now I’m crying cuz my sons father and his grandma on that side both lie for no reason and his dad steals a lot...like so much he was told not to go to peoples homes cuz he steals so much. Idk what to do anymore you guys. He had an Xbox and a cellphone I got rid of cuz of the bad behaviors and when he was good I’d give them back but now I am at a loss cuz he will destroy everything that’s not his. Like my boyfriend got me a new van and he will put spit in the doors and crush so much food in the floor and do all these crazy things and I need help cuz I’m at a loss plz no rude comments I need advice