My partner and I have been together 10 years. Committed, but unmarried. Unlikely to marry. Don't wish to marry. We have a daughter of 4.5 years.
Partner's sister and her husband have together 8 years, married for 5. It's the second marriage for each party. They have a son of 2 years and newborn daughter.
We are very friendly and see each other at least once a week. We babysit for each other and our daughter calls them Aunty X and Uncle Z. I love my niece and nephew very much.
Their son is beginning to talk. He has been instructed to call us Uncle A and First Name. I am apparently 'not really an Aunty' because I am 'only a girlfriend'.
I'm hurt, to be honest. AIBU to think their children should call me Aunty Scarlett and not just Scarlett? We're the only unmarried partnership in the whole extended family and sometimes just feel so bloody misunderstood.