I'm surprised that you have engaged with this woman for as long as you have. What did you hope to achieve by trading insults? You really need to block her number and cut her out of your life. You owe her nothing.
It sounds as if she still wants to be part of your husband's life and is fishing for information. She wants to know what is happening and is no doubt hoping that you are on the verge of splitting up. Don't give her the satisfaction. Stop communicating with her and cut all ties immediately.