"Well - let's say my aunt Chris gets a cake and we have some and there's one piece left in the fridge. I could take it, or I could leave it for her. I know how much I want the cake, and I don't know how much she wants the cake but I can guess, and I know how much I care how much she wants the cake. So I write down all the numbers, and if how much she wants the cake times how much I care is worth more than how much I want the cake, I leave it. I took the cake," she adds. "I could've split it in half, but it was pretty small already."