Can we talk in laws?

I’m pregnant with #2, haven’t told in laws yet. I don’t particularly want to, they haven’t been supportive in the last year or two since #1 arrived.

Before #1, we got on well-enough. Unfortunately, not a lot in common. After #1 arrived they seemed a bit hostile and still do. I have a close relationship with my own parents, so I see them often. My partner doesn’t make a big effort with his own family. Maybe a short phone call every 1-2 weeks.

I am thinking that the “off” behaviour towards me is down to jealousy. The foundation for a close relationship was never there so we naturally don’t see them as often as my own family. I highly suspect it’s jealousy because they ignore me or turn away from a conversation if I dare mention anything that’s related to someone other than them. We have never turned them away for a visit and they always stay for 1-2 nights at a time.

Unfortunately, this “jealousy” has manifested into occasional quite nasty comments, which have really upset me. I also get sidelined in conversations and family photo opportunities. And apparently #1 gets all their traits from my mil - not a big deal, just another way that they probably like to imagine that, I, the mother of their grandkid doesn’t exist.

How do I manage this situation?