My own parents (have always been awful people tbf) made a huge fuss of my SC when they first appeared in my life. “You’re our grandchildren too” they said. Until I had my own child and then everything changed. They began actively making plans that meant my SC couldn’t attend (they live with us 50%)
The final straw was when they came over 2 days after my birth kid’s birthday with heaps of birthday presents for her… only that particular day was my actual SS’s birthday! And they brought him nothing. They’d also “forgotten” my SD’s birthday the month before so I was already feeling pretty peeved.
This is obviously not their only shitty behaviour but it was gob smacking and I felt irreparably hurt by it.
Now, I know this kind of talk isn’t popular on MN, because “2nd wives” are universally thought badly of and must be married to a hell demon… but my husband and I are together for life. We just are. I just know it like I know my own name. I love the bones of the guy and I bloody adore his kids too. I really would move heaven and earth for my entire family - even the kids I didn’t grow.
So, I cut my parents out. Which is an extreme solution. 😅 (but really, they have a terrible track record of abusive bullshit, that none of my kids need in their lives)
If I hadn’t had to take this measure and I had a good family that I could actually talk to, I might have explained myself to them, because I don’t think it’s worth getting worked up over. Likely, your sibling has just misunderstood the connection you have to your step children. (I mean, for every good step-relationship it seems there are several bad ones!!)
I think my own parents expected my feelings towards my SC to change after I had my own kid and acted on that, instead of asking me how I actually felt.
And my feelings did change. At first I felt exhausted and had nothing left in the tank for my SC. Then I felt protective and looked forward to them going to their mums. Then I felt relaxed, like “oh yeah, I got this” as I found my groove. And then, finally, I felt more connected to them than ever.
Now when something is up with my SC, it isn’t just “my husband’s kid”, it’s my daughter’s sibling. And that brings it a bit nearer to my heart and makes me love and defend them more fiercely than ever.
And if you don’t get it, you don’t get it. Lots of people on MN don’t get it because they don’t see how a step relationship could have any positives. Maybe because they’ve had their own bad experiences. But that’s how I would try to explain it.
I mean, that’s how I would try to explain it if my own family weren’t fucking mental.
It would be bonkers to say I love my SC in exactly the same way that I love my daughter. But equally, I don’t expect that they love me the same as they love their mum and dad.
So, we come as a package deal and sorry if that’s a bit messy.
The final thing I would have to say to my parents, (again, if they weren’t selfish narcissists) would be that my SC have had enough drama and disappointment in their lives - they have lived through their parents divorcing. They don’t need any adults in their lives that let them down. They just need stability and positivity. So please help me to provide it, and don’t exclude them.
Sorry for the rambling and poorly styled response. Hope it was slightly helpful at least.