This is a Louis Tomlinson fanfic. People say I'm the luckiest girl on earth... Well I totally agree! I'm not only Liam Payne's little sister but I'm also Louis Tomlinson's fiancee. But one mistake made by Louis ruined the best relationship I ever had. I never expected this to happen. This was truly a "Surprise". What will happen to this relationship? Read on to find out.