The Descendants
(2011)

Matt King (George Clooney) is a local land baron whose wife Elizabeth has fallen into a coma after a serious boating accident.

Matt learns from his daughter Alexandra (Shailene Woodley) that Elizabeth was having an affair with a local real estate developer, Brian Speer (Matthew Lillard).

Matt, along with other daughter Scottie (Amara Miller) and Alexandera's friend Sid (Nick Krause), travel to a different island to track down Brian. Matt, all the while, is trying to sell the land due to the fact that the trust is about to expire.

Matt learns from his cousin Hugh (Beau Bridges) that Brian is with the company that is in on selling the land to a resort.

Matt eventually tracks down Brian to a house on the beach that his family is renting. Brian admits to having the affair but wouldn't leave his family, though Elizabeth would have.

Matt eventually goes back to the hospital to be with his dying wife. First though, he realizes he can't sell the land, even if it does annoy some of his cousins.

Brian's wife shows up to apologize to Matt for Brian's behavior, and to Elizabeth, who would have broken up the family.

Elizabeth dies, and her remains are scattered into the ocean.

Thanks Michael R!