Dive Into You — Chris Keniston

High school teacher Emily Everrett wants to add some excitement to her life. But first she must break free from under the watchful eye of her big brother and matchmaking mother. Two years after leaving the Navy, chick-magnet Doug Hamilton is ready for a change. Working in Hawaii at the Big Island Dive shop with his former buddies sounds like the perfect recipe for fun in the sun. If anyone can show Emily how to live it up, it's Doug. Except for one problem -- the honor code among men -- Never hookup with your best friend's little sister.