I'll try and keep this brief but forgive me if it's not.
DH and I have been together for 9 years and married for 8. We both have children from previous marriages and have two together.
He had been divorced from his first wife for 6 years and she'd been re-married for 4 when we met. I was not the other woman - his first wife left him for her second husband.
His children have never accepted his decision to remarry or acknowledged me and our children at all. They refused to attend our wedding, we are never invited to anything they do and his son got married earlier this year only inviting his dad to attend on his own two days before. My DH didn't go because we had plans already, but that's a whole other can of worms.
Anyway the point is that my step-daughter (age 28) sends a card every Christmas to "My darling dad and his new family". She has met us at wider family events such as weddings, funerals, birthdays, christenings etc.. We send cards and presents at Christmas and on birthdays including all our names. She knows who we are fgs.
It really gets to me, I know I shouldn't let it but every year I grit my teeth roll my eyes and seethe about it. DH has spoken to her but she says she forgets how to spell our names.
Personally I'd rather have them spelt wrong than not at all and it all seems so petty and such a dig at us every year.
I would understand it if I'd been the other woman, split the family, been the archetypal wicked step-mother but it's not like that. It never was - she is nice to her half-siblings by her mother and to her step-father's children, so why do we get considered "his new family".
Am I being unreasonable or should I expect my name and those of my children on a card at Christmas ?