Not one love but two(weasleytwinsfanfic)

Harry potter and little sister Lilly potter (made up character named after her mother) go back to Hogwarts for their 4th year so excited to see her friends but mostly Fred and George is harry happy about this no they are two years older then lilly. one of the twins little sisters kelly( made up character) thinks lilly is old enough to chose who she wants and there is only one person she would love to go to the Yule ball with but she gets asked twice who will she chose the sweetest twin or the twin that likes her the most?
All rights of characters belong to JK rowling and warner brothers expect the ones I made up