Op was obliged by the parents to stay with the sister so she probably felt like it was owed to her.
Anyhow, having the parents deal with it is probably the course of action. If they can afford it, they can front OP the money and have her pay them back.
tntdon t1_jc8i48x wrote
Reply to The old game "Aladdin" pushed me to create this scene by AnStation
This is making me feel old lol