unfair family....

so my husband family revolves around his sister.. shes just horrible.. like I know I shouldnt feel this way but she is mean and hateful and does things that no normal person would do... (like telling my husband I deserved to miscarry because I already had a child and it wasn't fair that I was going to have 2)

anyway, she just had her first child.. shes using that poor little thing as a pawn already (holding visits until she got what she wanted).. anyway.. we have an amazing little boy and his family has nearly nothing to do with him. they put no effort into seeing him. dont even come to his birthdays. cause their vacations fall at the same times.. well now I have a second little boy on the way and they're already starting the same behavior...

i dont want my children to feel like they are less important or put last, it breaks my heart.. my husband gets hurt by it but never does anything. hes used to that life..

idk what to do, if anything.. I feel emotional and conflicted about it.. maybe I'm being too emotional..

any words of wisdom for me would be amazing.

how would you handle this situation??