It's tied in with the "strong whiskey" line (I think). Uncle Will is your cigarette supplier. Buy the whiskey (maybe 3-4 bottles to finish the scenes), at 1300 hrs go to lunch, (left click only, if you use the "right-click/skip function you may go passed it) pretend to wash your hands, be grateful, and you go to Uncle Will, he's in the living room, drinking. He doesn't show up there but he's there. Every time you get him drunk he gives you a cigarette. Also (if you need the info), the mountain event shows up when you spend the day together with Cynthia. You "do not" want to miss the ending scenes at the lake. And "getting him drunk" will bring you to 1400 hrs with Melinda. You "do not" want to miss how this ends, either!