@Nottellinganyone I'm in a similar situation, although was not married to the father so never had expectations for myself, just for my child.
The grandparents had 2 children, who each had one child, so only 2 grandchildren. Their son, my partner died when our child was 3.
Grandmother dies sometime later, then Grandfather dies a few years later. Despite them all being truly awful to me in the aftermath of my partner's death, (from whom there was nothing left for me to raise my child or for them to inherit due to business set-up and massive legal bills to sort everything out,) I still maintained a relationship for my child's sake.
The child visited and stayed with them often (school holidays) despite living a distance away. We even included my child's cousin in some of our holidays, etc. I fully expected my child to inherit substantially - what had been their father's share of the estate, as Intestacy Laws would dictate.
It's been 6 years since the grandfather died. No Probate filed for either so the Wills are not available to see online.
I eventually paid for and downloaded the land registry for their properties, which I knew had not been sold. It seems that a few years after my partner's death, they became owned by Trusts. I assume their entire estate was put into Trust, which can only be for the benefit of their daughter, and ultimately the other grandchild.
The grandchildren are both over 21, so if my child was a beneficiary, they should have heard by now.
Without the daughter filing for Probate, we can't access the Wills.
I attended the funerals to support them and take my child, when even closer family of theirs (biologically and in distance) did not. (Nephew, first-cousins.)
I've never asked her directly, as after the first year or 2 of understanding she might still be overwhelmed by grief, frankly I'm now disgusted that she never approached me about it despite us still being in touch.
But my mum did ask her recently (after 6 years) and she confirmed that my child didn't inherit, apart from £2k that each of the grandchildren received at 18. The other child got their 18th Gift prior to the death, so I didn't consider it a genuine inheritance from the Will, just their matching 18th Gift that had been saved for them.
I'm still happy to be in touch with my child's cousin, and have always encouraged my child's relationship with their aunt, but I'm done with her now.
They've clearly been plotting disinheriting my child since they were in primary school, and I feel like a fool putting up with their nasty behaviour towards me in order to preserve my child's link to their father and "future inheritance".
(Sorry for the essay, it was cathartic getting it out!)