Married To The Uncle

Lisa is a 23 year old , she's a computer geek she works at the IT department. She's engaged to John and is about to get married , on the day of her wedding she is switched and marries Sam. Sam is a business man he's only dated one person his 28 and lives a boring life he's unhappy with his fiancé but will get married anyway because he doesn't want to hurt her feelings, what will Lisa do? Will the two get they happy ending? Will they stay married?..