Broke up with my boyfriend. He really had the nerve😑

I have 3 of my ex boyfriend's kids because his dumbass did stupid shit and is facing 5-8 years in prison. I took them in even though I didn't really have the space because their mom didn't want them. My mom is being a great help and support system because she loves his kids. His 4 year old recently started wetting the bed and asking when daddy is coming home. It's very sad. I got him some pull ups but we call them his bed time pants so he isn't embarrassed. He has a 10 year old daughter and 14 year old son too. Let me tell you I have been doing everything for his kids. I don't even have a room anymore. I sleep in the living room and gave my room to his oldest son. His 10 year old and 4 year old share a room. I have been sacrificing so much so he really had the nerve. I was on the phone with him and he was asking me to put money on tab or whatever for he could make other phone calls and get some stuff from commissary. I told him I couldn't because I have to use what money I have to care for his kids. He says "Don't you now get food stamps for my kids?" I told him it's not just food. I now have to double the amount of pads I buy because now there's another girl with a period in this home. His son needs pull ups. I have to pay bills to. He says "Why does he need pull ups. Just stop being lazy and clean the bed". He also says "She's 10. She's too young to have a big period so just have her use toilet paper"... He really fucking said that... I said no to both of those things and he called me selfish and said I never think about anyone but myself and compared me to his ex wife(his kids mother). This mother fucker really did that. I told him we are threw. I'm done with him. Not to call unless it's to talk to the kids and with information about his court, but besides that don't ask me for anything. He really had the nerve to call me selfish yet he wants to take money that's being used to care for his kids for his own benefit. Now the only reason I'm doing this is for the benefit of these children because he can honestly go fuck himself. I told my mom what happened and she brought over dinner to help with my stress. She also said I'm rocking at this mom thing. I really don't think I am. I'm just kind of winging it.