Almost three years ago my MIL died very unexpectedly when DS was 4 months old. Throughout the pregnancy she had been so excited as she so desperately wanted a grandchild but due to her being unwell she only ever got to hold him once before she died. DH understandably took her death very badly and I know it breaks his heart that she never got to be in DS's life and it kills him that DS will grow up never knowing who his Grandma was (he's now almost three).
About four months after MIL had died our FIL came round and announced that he had met someone - my DH was very upset about this as it felt as though hardly any time had passed since his mother's death and he actually walked out of the room because he didn't know what to do or say.
My FIL has now been with this woman for 2.5 years and my DH has only met her once (and even that occasion was an accident) and he does not wish to get to know her. I think the fact she came on the scene so close to his mother's death has caused him to put up a brick wall and I think he's angry with his dad and deflects this on to the woman. I have met her plenty of times and she seems very pleasant but DH and I never really talk about her, she just generally isn't mentioned. FIL never makes reference to her when my DH is around.
Anyhow - yesterday my FIL looked after DS for me for a few hours and his partner was there too which is obviously fine. However, when DS came back he started referring to FIL's partner as 'Granny' and when he did it for the first time it really stung DH. DH later said to me that the woman isn't DS's Granny and he was really upset to hear it come out of DS's mouth.
We don't know whether FIL is referring to this woman as being our DS's Granny, or whether the woman herself is doing it, but either way my DH is finding it hard to make sense of. He's adamant his dad would never allow another woman to refer to herself as 'granny' (out of loyalty to his past wife) but I'm not so sure.
DH has said that if DS is being told by either FIL or the other woman that she is 'granny' then that's it, he won't let FIL look after DS anymore. He said he won't have DS growing up thinking FIL's partner is his Granny as his mum will always have that title. I think DH feels like his mum's role is trying to replaced as that's how he felt when FIL started dating again so soon.
I feel like I need to say something to FIL because it's really upsetting DH but I don't know what? I can just see this snowballing and I don't want it to create even more family division.