Happy Ever After by Nora Roberts

Parker Brown turned the quartet's childhood game of wedding day into their dream jobs. Now she's the face of Vows-the one who meets every bride's demand, keeps every event on schedule and brings Emma's flowers, Laurel's treats and Mac's pictures all together in one glorious package. She know how to make dreams come true. Then mechanic Malcom Kavanaugh steps into her life. He loves figuring out how things work, and Parker Brown is no exception. But as a good friend to Parker's brother, Mal knows that moving from minor flirtation to major hookup is a serious step. This was a great conclusion to this series of books.