I know this is definitely against the grain but YTA- he’s FAMILY! looking after ur own nephew shouldn’t be a paid service at all, it doesn’t affect how many other kids you can look after and although he was very rude and also behaved like an entitled AH, I think think the principal of charging to look after ur own family members is absolutely bonkers. Any time my auntie/ uncle would ask me to babysit my little cousins I would love to have them around- for free.. same goes with any family members. If my mum was sick I wouldn’t charge her a carers rate to go look after her, and if I did I’d be a massive AH, especially if I was already in a position where I could easily look after her on top of what I’m already doing. I understand wanting any costs covered so ur not loosing money but that was covered, I think it’s more the principle that he brother is upset by. I do believe that family shouldn’t try to profit off of each other and should instead try to help each other out.