Family road trip!

This is your family. You’re the hated child. They only let you come on the road trip so you can clean the house. So on the road trip, there’s a sign that says “No toilets nearby” and the road is an hour before the next bathroom. Although, you REALLY need the restroom but you forgot to go at the house! Btw, you have a mom, dad, brother and sister. Your brother is older and makes fun of you, and your sister is younger and always tells you off. Your mom always believes your siblings and is strict with you. Your dad is…okay, he doesn’t really do anything to stop mom, but he doesn’t be rude to you! You can choose your age, gender and name! But make sure to write your name. So what will you do? Will you hold it in and perhaps go in your trousers? Or will you tell mom and dad and see what they say?