AITA for saying my husband needs to keep his mouth shut when my sister and I are discussing the custody of my niece.

My sister and I have been to every court hearing for my niece and have been the only ones pushing for her to be removed from my mother's home.<br><br>My husband has been on my sister and I's side since day one.<br><br>My husband's sister and brother and wife have disagreed with the outcome and want my niece to go back to my mother because she "isn't all bad".<br><br>Anyway, we all went out to dinner for my husband's birthday, and my sister and I were talking about the case trajectory and what we think will happen and when. And my husband kept piping in with his observations and shit.<br><br>And like, it's not that I don't trust him, I do. But I'm just so afraid my SIL and BIL will go and repeat what he says to my mother.<br><br>So I took him outside after the second time he said something and told him he needed to just keep his mouth shut when my sister and I are discussing the case.<br><br>He said he was just trying to help. And I reinforced that I wanted him to keep his mouth shut.<br><br>I also reminded him that he's only a witness to the case because he said something to my SIL/BIL the last time and it got back to my mother who tried to get him removed as a witness.<br><br>He said fine and went back in, but my SIL/BIL were all pissed off.<br><br>They're mad at me for telling him to keep his mouth shut, and I'm mad at them for the very real possibility that they'll repeat what he says to my mother.<br><br>AITA?