Brother has said he will stop contact between his kids and my stepdaughter over Christmas invite

Wow this is awful I'm so so sorry that poor girl - you've done nothing wrong at all - is there a race issue here? Is your DSD a different race to the rest of your family? I know a few families where this has happened...

And you didn’t ask why/what had brought this on? Seriously?

Your arsehole brother is a prick and is worried about his kids’ inheritance. What a lump of knobcheese. I’m pleased your parents know what kind of son they spawned

What a vile creature your brother is. That would be it for me.

I grew up in a blended family but I only ever have known it as family. My eldest sister is from my mum's first marriage but I was 8 before I knew this. My dad and his family treated us all the same whilst we were children, once we became adults my sister and my nan drifted apart but broadly we had a similar upbringing.
Right up until 2020, when I got pregnant with my first and my nan asked my dad if he was excited to be a real grandad this time around. My eldest sister had a 10 year old. He told her that he was my sister's dad in everyway that mattered and a proud grandfather to her child as he will be to mine.
It was the first time in 30 years that my nan made a comment like that to his face. My dad didn't speak to her for a while after that.
I wonder whether the closer you are to having your own child is making him speak about things he hasn't dared voice before.

WTH is wrong with him?

I could just about understand if this was a new boyfriend and this was the first time you were introducing his child to the family, but this isn't the case.

You did mention religion - is either your DH or your brother very religious? I wonder if there is some sort of issue around this that has triggered things, although given that religions tell us to treat others with kindness, that doesn't seem like a feasible excuse either.

You should tell your husband. It isn't fair to keep this from him, and the longer you do, the worse it'll be.

Re: stepchildren not being 'part of the family' this is a ridiculous mindset. They ARE part of the family by virtue of being the stepchild of someone in it. I have blood related nieces and nephews and step-nieces and nephews. It wouldn't occur to me to treat them differently because it would make me a dickhead.

Good for your Dad OP. We have been a blended family for 20 years. My husband and I had a child each when we met and one together. Both families embraced the ‘step’ children int the family and the are treated as equal grandchildren, niece and nephew etc which is as it should be. Your brother is being an absolute arse. I would try speaking to SiL to see if you can get any insight as his behaviour sounds really quite strange and out of the blue 🤔

This is more AI nonsense

I would no longer have a brother, simple as that. He would be dead to me. Wicked, horrible man.

Has he had a bang to his head?
what can have made him change his attitude to a little girl??

Contact your db and tell him this is not hanging over you until after Christmas, he needs to tell you now what had changed.

And ask your parents to put pressure on him to explain too. Unacceptable for him to drop a bombshell like that without giving a reason (even if the reason is probably unacceptable too).

Has you dsd told your nieces Santa doesn’t exist or something equally ridiculous.

The OP was also pregnant last month.

I do think there's something else going on, but the OP needs to get to the bottom of it with both of them instead of avoiding it.

My guess is he is jealous and resentful of your parents embracing your DSD as a grandchild. Is there an inheritance in the offing?

Otherwise, if your DH is of certain heritage, has your idiot Bro been taken in by the dreadful racist / Reform / anti immigrant rhetoric that SM is steeped in these days?

I’m wondering if DH’s religion is key here. In the initial messages was it possible that the emphasis was on Christmas when he asked why you’re bringing her?

ie if DH is Hindu for example, DB knows/assumes DSD is too, and therefore why are you bringing her to Christmas?

Doesnt in any way excuse his behaviour of course! But might explain where he is coming from.

If not, my second guess would be money. If his eldest is 15 your parents may have offered some money towards university or driving lessons or something and explained that they will do the same for all of the grandkids.

I think that you need to thrash it out with him and get to the bottom of what is going on.

Your DH might be more upset if you don't tell him.

At the moment it's just your DB being a dick. Your parents have your back.

There's no need to tell DSD anything. If he doesn't want his children around DSD then he's welcome to not attend any family functions.

Unfortunately some racists manage to hide their hatred and the pregnancy could have become the ffs now she’s stuck with him made a baby with him and snapped his racist little brain. If he’s racist that is.

He sounds like a knob.
When is this Christmas dinner?

I honestly don't see how you can have a relationship with your brother after he's been so horrible about your stepchild.

Good on your parents for standing up to him.

Everyone can guess 'Is it this?' 'Could it be that?'

But only one man knows the real reason and the second man might have a clue.

They are who the OP needs to speak to.

I don’t class my siblings step kids as my niece and nephew, but I don’t care if they attend family events. Why is your brother so bothered? He doesn’t have to think of this child as part of the family, he just needs to be polite when he sees her. Like he would hopefully be to any child.

Your brother seems to have had a shift in his attitude, so if this is real, there’s a reason for that.

Is you step daughter a different skin colour to you?

But even that doesn’t fully explain why the change in attitude (though people do fall down rabbit holes online that can change tier views drastically).

The blood only thing is nonsense anyway, his wife is there and she isn’t a blood relation.

You mention DH is a different religion, could it be to do with that? Depending on the religion, could he be antisemitic? Islamaphobic?

You mention that your DH is a different religion - is heJewish or Muslim? And is he of a different race? Ie is there a chance your DBro is being racist? And, if so, what will this mean for your own child when they are born in April?

Your DB is exceedingly hateful to your innocent 5 year old (step) daughter.

Unfortunately, the same happened in my family. It was a fight that a non-blood child was getting an inheritance share from my parents. Gutlessly shameful.

Publicly shame him outside your family.