Some of the responses on this thread are wild to me.
no wonder we are where we are in society.
OP I don’t think you’re wrong at all. i think when you marry someone you absolutely should expect them to treat your very young children like their own and they should expect, prepared and want to do the same. I would not be happy with the attitude that because he didn’t sire her, it gives him the option of making very big decisions around fairness and parity when it comes to two children who are fairly close in age.
I saw your previous post that said you asked your in-laws what they were saving for their biological GD so you could match the savings for your other DD, this seems like a lovely thing to do and a good compromise. The fact they wouldn’t tell you is awful and petty in the extreme. That’s not just not treating the girls differently; that’s actively trying to make sure one is disadvantaged for no reason at all when it is you who would be matching the savings.
my mum had a half brother and she refuses to call him that. He has always been and will always be her brother. I don’t buy into this attitude that the in laws should be excused from treating the two girls differently. Family set ups are different; your daughter is very young and should not be made to feel different or any less than “family” simply because she is not biologically related. How utterly awful.
id be seeing all of them, including my husband, in a very different light.
if others think that’s grabby or entitled then so be it. But I don’t think you are in the wrong here.