Tickled by sisters!

"Nonono!" Glenda squealed as both sisters reached down to her and began tickling their helpless, prone sister. Instantly Glenda burst into an uncontrollable cascade of giggles. She flailed wildly, bare limbs kicking and reaching out as she squirmed in place. Her older sisters were relentless, tickling her neck, her thighs, her armpits and stomach.

"Stop!" Glenda squealed, feeling a growing pressure in her bladder. She hadn't even had a chance to go to the bathroom.

"Hahhahaha I've got to pee!" Glenda admitted through giggles. Her sisters just laughed and tickled her more. Glenda tried to protect herself, but they were relentless.

Then... she couldn't hold it anymore. A wet spot began forming on her nightie. Her sisters pulled away in both amusement and disgust, watching Glenda, a member of the royal family piss herself!