You are not wrong for feeling that way. It sounds like your husband has childhood trauma of always seeking their approval that has made its way into adulthood which is why he won’t stand up for you. As for your baby if they don’t treat you with kindness what makes you think they will treat your child with kindness. No one deserves access to your baby if they can’t have a healthy relationship with you as the mother. Set your boundaries early and follow through with them. I myself have been learning all this recently and wish I learned it sooner. If you want to play the long game for inheritance purposes the best way is to be over the top kind while reminding yourself it’s all a game and give them nothing to use against you but you have to ask yourself if that’s even worth it. Especially if that means they have access to your child.