Names are not real..
My niece (Bree) is 25. She's biologically my step-niece although my brother (Adam) was never married to her mum (Emma). Bree was 18 months old when Adam met Emma. Bree was the result of a holiday fling and her bio dad gave Emma fake contact details so she had no way of finding him to tell him about the pregnancy.
Adam brought Bree up as his own. He has no children of his own.
When Bree was 12, Adam and Emma split up but Adam still saw Bree regularly and she stayed over at his house every weekend.
Fast forward to 3 years ago and Bree did an ancestry dna and discovered a half sibling. Last year she met with her bio family. They are about 3 hours from us so she doesn't seem them that often but has been been on holiday with them and spent Christmas with them.
My poor brother doesn't see anything of her anymore. He brought that girl up as his own. He's done absolutely nothing wrong but she hasn't spoken to him since February. Bree moved in with her boyfriend in January and she never have Adam her new address. He knows the town she's in but not the address and she doesn't answer her phone to him or anything. Same for me and my mum, who treated her like a grandchild. She's completely ghosted us.
None of us have contact info for Emma
Am I, or are we, being unreasonable to be upset and hurt that she's dropped us?