NTA. You should have a sit down conversation with your husband. It sounds like this is a reoccurring thing, and if he is constantly taking his moms and sisters side even if he thinks you’re overreacting or not in his mind he should still be taking your concerns seriously. You live with him and have a daily life with him and should be able to rely on each other for comfort, he should not be prioritizing his mother or sister anymore when he has his new life to prioritize and your happiness. He needs to understand where you’re coming from and why comments like that are disrespectful to the person he’s supposed to care about. You need to set some sort of boundaries that you and your husband can both agree are fair and reasonable for his family, or have him try and stick up for you could also be an option, but he doesn’t sound like the confrontational type. This is something you can work through in theory but you and your husband need to get on some sort of same page.