The Seven Deadly Simpson Brothers by Jojo_B 

Summary : The Simpson brothers are the most dangerous gang in the world and Coral finds herself getting more and more involved with them. Each seven of them are influenced heavily by each of the seven deadly sins, and when Walter Simpson the angered 18 year old sets his eyes on Coral, she just can't help but feel something for him too. Coral knows Walter is unpredictable, and trashes everything in his path during his rages. She also knows that everyone of the Simpson brothers carries a knife and sometimes even more. Falling for the guy, and being dragged into the hazardous family is definitely a bad idea.