The Unhoneymooners

The bride and groom and everyone else at their wedding takes ill—everyone except the bride's identical twin sister and the groom's brother. The bride insists her sister and new brother-in-law take the fabulous honeymoon. But there's one problem: the bride's sister and brother-in-law hate each other.

Yes, it's unlikely, and more unlikely things happen once the two arrive in Maui, but it's all in good fun. You know what is going to happen, but, hey, just enjoy the magic.