All those posters who insist that step grandchildren, step nephews and nieces etc should be treated exactly the same as biological relatives, presumably you think that in laws( ie people related to you only by marriage, like step relations) should be treated exactly the same too?
So if you have a son or daughter in law would you spend exactly the same amount on them as you do your child at birthdays and Christmas?
Do you expect your parents to spend the same amount on your spouse as they do on you?
What about when grandchildren get married, should the grandparents spend the same on the grandchild's spouse for birthdays and Christmas? What about sisters and brothers in law?
I have a daughter in law and had an ex son in law. I love my daughter in law but she has her own parents, I spend generously on her birthday and Christmas but not nearly as much as I spend on my son. I also do give joint presents sometimes. Her parents give her much more generous presents than they do to my son although they love him very much, we all think that's normal.
My mother gives her a token gift or sometimes nothing, my son's never had a gift from his wife's grandmother, again that's all normal and fine.