Husbands ex/baby momma...help

Help...
My husbands ex is becoming unbearable. 1. We are taking her back to court for failing to abide by the parenting plan and in doing so has cost my husband not being able to see his children for a year and half. Well we received a email from her attorney to ours stating that she wants a re-introduction plan made since he hasn't seen the kids, and they are "stressed out"  at the thought of being around my husband (I wonder why their stressed probably because you verbally abuser their father in front of them) and because their youngest doesn't know him (again, due to your actions). She also is seeking supervised visits because my husband said he would run away with the kids given the opportunity (complete lie). On top of all this along with a million other things she doesn't pick up his phone call for his daily telephonic calls (per the parenting plan) more than half the time , she will leave the kids with people over weekends and not tell him who so he can call to have his daily phone calls. She refused to send him pictures of the kids, medical bills, update him on anything for the kids. Refuses to send him things the kids make for him. On top of this, she stalks us to the degree of finding out who our foster care agency is, calls our case workers CELL Phone, REPEATEDLY, and slanders my husbands name and character, threatens them, and makes false accusations against my husband!! We have told her several times to stop harassing my husband as well as me (she has called my work several times in the past, has impersonated me to get information on us(but you can't prove it) and she's had people call and Harrass me from wee hours of the morning to late hours of night. )
I am truly exhausted and just don't know if I can deal with this all anymore. I love my husband I really do but Jesus Christ I didn't choose to have kids with this narcissistic leech and I have to deal with her the rest of my life. And for her knowing I can't have children try and jeopardize my way of having a child (foster and adoption) is just absurd to me and a ultimate lack of character displayed.
Idk what the hell to do, I'm at wits end. I made a police report against her for now.