It can't be good for children to grow up in the reality-free zones advocated by some as how blended families should operate.
I can see why, in the case of child abandonment or very early bereavement, you might want to take on a step-child "as your own".
But where a child has two loving parents, why is there any need to pretend their step parents are third and fourth full parents?
Why is it not OK to acknowledge the reality that you live in a different kind of (just as good, maybe better?) family?
That the woman who lives with you in your father's house is not another mummy just like the one you have already, but is still another adult who cares about you and is interested in you and gets to tell you off?
I'm basically an outsider here. I'm not a stepmother, all my children are DH's, I not a stepchild.
I'm just amazed at the demands that are being made here of women - that if they marry a man with children it is not enough to grow to love the children, to care for them, to treat them well and fairly.
No, unless you can suspend reality and pretend they are your first born, you are treating them badly.
DH has a lovely stepmother. She is from an enormous, complicated family with steps all over the place.
Most of what I know about step families comes from her.
Does she love DH and his sis? Undoubtedly.
Is she a third granny to our kids? Definitely.
Does she treat her step kids the same as her own children? No
Her step grandkids the same as her own children's children? No
Is that mean/sadface evoking/hurtful? No
She is extra. She's a bonus.
If MIL and FIL had stayed together we would never have had her in our lives.
We're glad that we do. And she's glad too.
There's an element if choice to stay close that doesn't exist to the same extent in nuclear families.
Different is OK.
Pretending to be the same is weird.