It's your birthday and you took the day off to spend the day with your sister, hoping that she will have something special planned for you...only to find out that she totally forgot! Seeing that you are disappointed, she is offering to sit on your face or let you cum all over her big tits, she will do anything you want! But this time, you will ask for a very special birthday gift: you want her to pee in front of you to make up for forgetting your birthday when she only has one brother! She has no choice but to oblige!