AITA for getting upset with my husband over his phone conversation with his twin brother?

Very brief back story…our daughter was molested by my husband’s niece for 5 years when they were younger. It happens to be my husband’s twin’s daughter. Needless to say when this all came out, they denied any wrong doing. To this day, this girl has never had to speak to anyone about what happened nor has she been held accountable for what she has done. My husband’s family totally blamed my daughter and I and disowned our entire family. My daughter and I have had NO relationship with anyone in his family for almost 8 years. My daughter has also made it very clear to her father that she does not want them to know anything that is going on in her life, she feels they lost that privilege when they disowned us when she told us about the sexual abuse. A couple of weeks ago my husband’s phone rang and he went outside to answer it. I over heard some of the conversation and honestly thought it was just a friend of ours calling because of the tone and content of the conversation as it was all about our kids and what they were currently up to with a fair amount of laughter involved. After about 30 minutes, my husband finished his call and came inside. I casually asked who was he talking to, he said his twin…I lost it. I was so mad, that not only did we get into an argument, I also sent the asshole twin brother a text message telling him to never inquire about the well being of our children ever again. Which he took a screenshot and sent it to my husband with the caption “Your wife has issues”. Damn right I do, your daughter molested our daughter for years!!! AITA for telling my husband that he had better address this with his twin or this could be the end of our marriage??