i really want to choke her 😡

i have three children from past relationship. and my bf has 1 son but its not his! he has been there his whole life. so they call each other daddy/son. now i am pregnant. so we are adding one more to the bunch. well lets get on the ex!! When we started dating this girl harassed me, got me fired from my job, threatened me, follwed me down interstate throwing things out the window at me! it was a rough start dating. well one day i took his son food because the babysitter (my friend) said his mother didnt bring nothing. well i had my children with me and his mama showed up threating to kill me, break my neck all that mess in front of my kids because she didnt want me around her so ! I LET IT ALL GOO! there for a while she held this poor boy over my bf head. wouldnt let him see him. well he has been at our house for a while now. she never text or call and ask about him. she reads our messages but never replies! then we heard from her sister she wants him to live with us! she is 43!!! 43!!!! she says she is not done living her life. I WANT TO CHOKE THIS WOMAN! that is your son! u are 43 its time to give up the club life! i am 28 she is suppose to set a example for other people including me. i love this boy. i hurt so bad knowing his mama dont care! i cry every night! every one says its going to be to hard on me to raise my 3 plus him with one on the way! but i feel like i dont care how hard it will be! i will put blood sweat tears into my family to make sure all including him are safe fed and loved no matter what!!