I'll Wait For You. (Harry Styles Fan-Fiction)

Mackenzie and Lottie have been best friends since birth. Louis has been like a brother to her. When Mackenzie's parents have to travel the world for a couple months, she stays with the Tomlinson's, basically her second family. But Mackenzie isn't the only guest staying at the Tomlinson's. Louis's bandmates decide to spend time with Louis's family. Louis jokingly tells the boys that his sisters, which include Mackenzie, are off limits. The boys all know it's illegal for them to date someone under the age of 18 so they just laugh. Mackenzie knows this rule too, and never even wanted to date anyone more than a year older than her. But when Mackenzie and the curly-haired, green eyed, cheeky boy of the band, Harry, become close, everyone gets suspicious. They both say they're just good friends, and nothing more. But do they want to be more than friends? Will they both wait until Mackenzie is old enough? What will Louis think? Was Louis serious about the boys not dating his sisters?