One Flew into the Cuckoos' Nest

(Harry/Five-in-One! Inspired by Blood Brandy's Vegas challenge! Evil Dumbledore!) After an arduous fifth year, Harry going on vacation to Las Vegas seemed like a good idea at the time. But when he wakes up with a hangover, a wedding ring, and in bed with the psychic quintuplets known as the Stepford Cuckoos, well, his life is going to be changing, for better or for worse...