Am I being petty? Long post.

My husbands family isn't really around at all. They literally live a 3 minute walking distance-5 minute drive from our house except his mom who lives an hour away and she's more involved than anyone. We are expecting our first child together, he has 2 from a previous relationship, and it's the only grandchild they aren't gonna have to bribe and beg to see. Let me explain. His ex only let's his family see the kids when she needs a babysitter, money, them to take her places/buy them things. They aren't allowed to talk to my husband and myself or they can't see the kids, when they have them there is to be absolutely no contact with us or even mentioning our name or our daughter. All of his family goes for it except his mom because they hate each other anyways. My husband and her are currently going through a custody battle and she's keeping the kids away from him until she has absolutely no choice but to let him be involved.

She went and told his whole family we were having a boy when were not but his grandmother told everyone there was no need to come to our gender reveal party so literally only his mom and step dad showed up. Our wedding was the exact same thing, only his mom and one sister came. Well now all over his family's social media you see them constantly posting pictures of him and his ex from forever ago, making pictures/posts of all the grandkids/great-grandkids with her in the pictures but leaving me and our daughter out of them. They are constantly "calling him out" for not being involved in the kids lives and throwing up that they see them and he doesn't. His grandmother has cancer and they haven't spoken in 8 Months because she told him to leave me and our daughter and go back to his ex so she'll stop the drama and he could be around the other kids. He obviously said no so she told him that he's getting exactly what he deserves and to not contact her on her death bed.

My daughter is due in 5 Weeks and I've decided that even once the custody is final and his family goes back to contacting us that I am not/will not be involved with them in anyway, I do not want my daughter around any of them and I know my husband will understand but I don't wanna hurt his feelings. Am I being childish/petty?