Fat girl desperate to pee, empties her big and full bladder and then she pee but on this excavator bucket

We went for a ride outdoors. She had a lot of juice to quench her thirst. She has a big bladder (being a big girl) but it gets full and she needs to empty it peeing outdoor. We had to pull over because she had so many liquids that she cannot held herself. She climbs on a excavator bucket and she opens her legs and pee trough her pants right there being very scared to be seen by cars and people passing by. Yet she still manages to relive herself on the excavator bucket in a tight pee jet.