Tell your husband to text her and tell her if she dials your number one more time that he will get a no contact order. She sounds scary...be careful!
I agree 100%. He needs to contact her with you present and let her know in no uncertain terms to stop contacting your family in anyway. She needs to know that you mean BUSINESS and that her Fatal Attraction self is NOT allowed to play any part in what happens in YOUR family. Does her H know about the affair? Is he the type of person who will threaten your H? Do they live near you, or do her children go to school with yours? Right now, focus on protecting yourself and your children emotionally and however else you need to from this monster. Grrr...I wish I were there to answer her calls for you! I'd put that little hussy in her place!
Also just a bit of advice, since she sounds like a pot stirrer....if she tries to forward you any communication she has had with your H (texts, emails, etc), I strongly advise that you put them away and do NOT read them. First of all, you never know what she has fabricated. She doesn't sound like she is the most sane person in the world. So don't hurt yourself anymore by participating in that game with her. However, it may be wise that anything you are given is put away for safekeeping just in case you need it in the future. Still, under no circumstances listen to or read anything she gives you.
E, I have so much empathy for you right now. I will say that from what I know of you (from reading your threads), you are a level-headed, loving, forgiving, kind and AMAZING woman. I can also tell that you are a top shelf mom and wife. Do your best to keep your emotions in check (trust me...I know how hard that is!) and think with your head and not your heart right now. I'm in your corner more than ever before!