Your little siblings are already copying your walk, your words and your excuses. You got promoted without applying.

Nobody applied for this and it arrived anyway. From the moment there was a younger one in the house, you became the working example of how a person their age behaves, and they will copy the parts you are least proud of with total accuracy. It is an unreasonable position and it is not going to be withdrawn. The only question left is what you do with it.

Pick one thing to get right in front of them this week, whether that is apologising, losing well, or putting the phone down. Let them copy that one.