Stepdaughter ex wife issues

So I’ve been married for 10 years and have a stepdaughter who just turned 15. It’s been no secret to anyone that my husband and I have had problems for years most of which are from his alcohol addiction. I’ve had to make him leave a few times over our course because he can be explosive with his temper. He goes to stay at his moms when we need a break. So a couple months ago he got sober but drinking was his coping mechanism to treat his anxiety problems. I begged him to see a doc to help with the root of his drinking which is anxiety but he wouldn’t and said he will cope alone. Shortly after he got sober he went into a rage against me in front of our kids and I put him out. He went to his moms. Two days later his daughter came to our house. She asked when dad will be home I said he’s not. He’s at maw maws. She asked why. I didn’t go into details but she knew before we had problems because of drinking but knew he had been sober so couldn’t blame that and wouldn’t want to lie anyway. So I told her since he’s quit drinking his temper has been bad and we got into a fight and he left we need a little break that’s it. She has issues with her dad because he’s been less than efficient in making efforts with her over the years. When talking about it her face said a lot which was hurt and anger regarding her dad. Sorry but I love her and know she has a lot of deep rooted issues with them and didn’t touch on anything besides I said I know you have some things inside towards your dad too and one day you should tell him. That was it. He text me that night that she was at our house and asked what I told her I said the truth. So that was a few months ago but last night his ex wife decided to call my husband and tell him about what their daughter told her mom and her mom is mad at me and blocked me because she didn’t like what was said to their daughter. I have always tread so carefully around the situation with his ex wife and daughter because I respect that it is a delicate situation and I as a stepmother know my boundaries but apparently after all these years that I’ve been good never doing wrong as a stepmom I have one honest conversation with my teen stepdaughter who ASKED ME what happened and I was honest. No details just honest. But I’m being persecuted for it. I’m so sick of this situation for more than this reason but I’m done!