In laws treating me and other DIL differently

Since my first child two years ago, my in laws changed - they’ve said and done some inappropriate things and made me feel uncomfortable and like an ‘outsider’ to their family. Other extended family members have also been odd with me, so I’m pretty certain they’ve been talking about me behind my back. I don’t know what I’ve done.... latest - they’ve made it abundantly clear that the other DIL that they have is a favourite. They chat all the time, visit all the time and do social things together. I don’t want that for myself because you can’t undo the toxic behaviour that they’ve already showed... but I’m still hurt by it all. I’d love to wash my hands of them, for the sake of my emotional/ mental health but it would cause a wedge with my hubby and I have no idea how a relationship with them would turn out with my kids.

I’m weeks away from giving birth to baby 2, not sure how to go forward but it’s eating at me.... just looking for advice or solidarity if others have difficult in laws too?