The sun beats down, intensifying the heat between her legs as she wriggles in her seat, trying to find relief from her engorged bladder. Her panties cling to her skin, the fabric darkening with her struggle. She gasps, feeling the first trickle escape, wetting her panties further. The thrill of public exposure mixed with her growing desperation sends waves of pleasure through her, making her toes curl as she continues to fight the inevitable release.