Wow that is two facs dont worry my family is the same way knuckle under hunny if its in family theres no escaping it laugh at the fact they they dont deserve to be your true friends and fam. Try to turn the frustration into comedy or somthing that makes you smile.
Long story short bm doesn't like me she talks smack about me to them they go along with it and yet they smile in my face. I find out about it and confront them about it but they always deny it.
Its normal for any human to feel that way but uou shouldnt hate someone because they still talk to their sons childrens mother i dont know the whole story tho maybe find someone in the family to talk to or your husband