Summary - It's your birthday, and you're certain your girlfriend has a great gift for you. She kept texting you about cakes, even referencing her little sister's cake. You weren't too sure what the gift would be, but it had to be something amazing. I mean last year, it was the new PC. The year before that, she bought you a fancy watch. She seems to just love surprises, so it's no shock when she invites you over for an early celebration. What starts off as an innocent invitation takes a drastic turn, when you come face to face with your girlfriend's little sister, hands tied, on all fours, with a bright blue bow in her hair that says "HAPPY BIRTHDAY." Your girlfriend definitely went above and beyond this year and you were so excited to try some of this 'little sister cake' your girlfriend kept bragging about.