Being a parent to triplets is tiring, but the sister has to understand that that’s what she signed up for when deciding to carry them full term. She chose to be a parent, so now she has to actually parent. If her & her husband doesn’t want to watch them while on vacation then they needs to hire a babysitter to either go with them, or leave them at home with a babysitter. They don’t get to just drop the triplets on OP b/c he’s young 🙄