Tired of being used

We are planning on buying hopefully in the next few months. Well my "mother" Decided to leave her husband after she caught him cheating AGAIN! Decided to do this while I was pregnant but not tell me becuase she didn't want to stress ne out(I have a history of miscarriages). So instead she tells me right before xmas. How do i find out? By my younger sisters coming to my home at 2am crying. I have a newborn and doing everything alone at the time becuase my husband had to go to work the following week after our little girl was born. My "mother" has never been a good mother to me but yet I always give her the benefit of the doubt and try to move past what she has done to me. I am officially at my wittes end! How dare you expect me to give up my FHA to help you get a home because you were stupid and didn't listen to me when i told you to have everything notarized so he wouldn't screw you over. How dare you expect me to put you over my own family? Just because after 25 fucking yrs you finally got the nerve to leave. When did you put me first? when i told you he was molesting me at 8yrs old! Thats wasn't even when it started! Thats right you were with your golden child(the gangerbanger). It was very easy for you to show me the fucking door when I told you it was hell being there (yet i paid all the bills but the mortgage). Yet your scumbag son pulls a gun on your little girl and robs ppl at gun point and he still remains at home and is welcomed back home after jail for the 3rd time! Instead you decide to be of no help after my long hard birth and add more stress to my already full plate. I continued to be supportive and sympathetic to your situation but i am done. How about you start asking your bf for help. You seem to already have your life with him and his kids anyways. I don't need a mother who only comes around when she needs something. I already spent most of my life having you make me feel like i ruined your life at 19 and i am done trying to make it up to you. I owe you nothing. You already ruined my childhood and adolescence. I'm not going to let you ruin me daughters either. I've done so much for you, you ungrateful woman. I should have put your scumbag husband in jail but instead i lied so that you could be happy. Go beg your crappy son to help becuase i am done being used by you.