In a small heavy saucepan, combine whipping cream and sugar. Cook and stir over medium heat until sugar dissolves. Remove from heat; set aside.
In another small saucepan, combine water and gelatin. Let stand for 5 minutes to soften. Heat and stir over medium heat till gelatin dissolves. Stir gelatin mixture into whipping cream mixture; transfer to a medium bowl. Stir sour cream and vanilla into cream mixture; mix well.
Cover and chill in the refrigerator for 30 to 45 minutes or till mixture thickens like the consistency of yogurt. (Or can place gelatin mixture in a bowl of ice water and chill about 25 to 30 minutes, stirring occasionally.)
Layer cream mixture and Raspberry Sauce in each of 6 parfait, martini, or wine glasses, ending with Raspberry Sauce; swirl sauce into the cream with a thin metal spatula. Cover and chill in the refrigerator for at least 2 hours and up to 4 hours. Top with fresh raspberries just before serving. Makes 6 servings