Name changed in case this is identifying
3 adult siblings.
1 single with low paid job, no degree due to ADHD and some mental health issues in late teens.
2 Married, both on high incomes.
3 making career out of being in education, has low income but in a relationship and therefore splits costs with partner.
No children yet.
Siblings 2 and 3 and 1 parent along with siblings partners have booked a holiday together next year. Parent is paying for sibling 3 and their partner to go.
Sibling 1 not invited. Not told about it until it was booked and was told by parent that they should be ok with it. No option for them to join.
Sibling 1 not had a holiday for over 13 years. Offered some money instead of which 50% they can use for a holiday the other 50% parent wants to keep as 'savings' in case they need it in years to come.
Narrative about sibling 1 is that they are bad with money. In reality they live hand to mouth and do their best but money only goes so far.
Relationship between siblings 1 & 2 is strained but not due to lack of effort on siblings 1 part.
It's probably obvious which sibling I am.
Aibu to be really hurt? What would you do if you were sibling 1? Walk away? Say nothing and just accept it? Make it known im not happy with it and potentially cause a huge row?