He suddenly wants me to pay half the bills

So me and the father of my 2yr old twins have a house that we are both on. I made the down payment and the deal was he would pay all the bills in exchange. He pays the bills and I buy the food and everything else for the house and family. I believe he's an abusive narcissist and at the moment we sleep in separate rooms and I'm just trying to heal and figure out what I want to do. Our connection is lost and he always says things in arguments to make it worse m. He's upset that I no longer want to have sex (it's been 5months & I cried after because I hated it) so he's making me pay half the bills suddenly because he thinks he's rewarding me but I see it as him doing his part for his children. He's the reason we have this house (he made me feel bad about wanting an apartment, saying I was separating the family) TMI, he also ejaculated in me when I told him not to, I was pushing him off me *surprise twins. He buys nothing else he doesn't buy the girls' clothes, toys, food I do all of that. He makes more money than me and he works more hours, him paying the bills is not a big deal for him, he's just saying half out of spite. For me I also have a car payment, car insurance, credit cards that I already paid for personally. I would end up paying triple what he pays a month if I agree to pay half of the bills. Honestly I really don't think it's fair that he wants to change the dynamic of the agreement that we made just because things aren't going his way when he's abusive and blames me for everything. He's called me out my names, broken my things, belittles me, and more but blames me for his reaction and can't see why I'm disconnected. Im considering moving out but if I pay half the bills it's eating at my saving to move out with the girls and he knows that. He wants me to pay half and keep living here, he sees no point in me moving out. He's like, you should have thought about this before you treated me like trash. He thinks he's the victim. Any advice helps, thanks.