In a large bowl, toss the honeydew and strawberries with fruit spread; set aside. In a bowl, beat cream cheese and sugar until smooth. Add sour cream; mix well. Fold in whipped topping and cake. Drain juice from fruit mixture. In a trifle dish or deep salad bowl, layer a third of the fruit, a third of the cake mixture and a third of the chocolate. Repeat layers twice. Serve immediately.