Oh, dear. It's Limestone's least favourite time of year. Her birthday. Luckily (or unluckily) for her, her loving younger sisters have a surprise party planned for her. Pinkie, along with her sisters will put a smile on her face, ore she simply can't call herself the best party girl in Equestria. (Helped by a friend. CONTAINS LOTS OF TICKLING, WINE AND LOVE SHARED BETWEEN SISTERS.)