Bonnie's on a long car journey and really struggling to control the urge to pee. She tries so desperately to contain the urge to pee, crossing her legs, holding her thighs, but she cannot hold it any longer. She jumps out of the car and runs to a nearby grass verge. She lifts her skirt but doesn't manage to pull down her panties and pees into them. Through the fabric onto the grass. Her panties are saturated.
