For the Love of Twins

Cairo "Cai" Agatha has been best friends with Fred and George for FOREVER! But best friends aren't supposed to start fancying each other, are they? Aside from the relationship drama these three must go through, there's also the problem of a very special event taking place at Hogwarts this year! Will they survive it all? Fred/OC, George/OC. Rated T for mild swearing and etc.