Dead Island Side Quests Walkthrough: Family Matters

You get this quest from Max, in the lifeguard tower reception room near the vending machine on the first floor. He is comforting Kelly, and wants you to check on her husband, a concierge named William. He believes William is hiding in the Diamond Bungalows.

Head to the Diamond Bungalow district to the far Northeast along the shoreline. You can get there by going to the lighthouse, then jumping over the fence. There will be many zombies along the way so be prepared for battle.

Head along the beach, then on the boardwalk, following the minimap route. You will encounter some tough thug zombies along the route. If you are having difficulty beating them, just sprint past them. The route will also take you through some water - just jump onto the water and climb up the ladder to get back on path.

Eventually you will reach a bungalow with Svetalana in there, asking for champagne for another side quest. After you talk to her, open the  bedroom door in the nearby room where you will find William seating on the bed surrounded by some ladies. He will tell you he doesnt want to see his wife and bribe you to tell her he is dead.

Make sure to take care of other side quests in the area, before heading back to Max and Kelly with the "good" news.