In large bowl, combine sweetened condensed milk, and water. Add Pudding mix, beat well with whisk. Chill 5 minutes, now fold in whipped cream..that has already been whipped from a pint of whipping cream, which will equal the 2 cups of whipping cream that this recipe calls for. Spoon 1 cup pudding mixture into oval casserole dish, top with wafers and bananas. Repeat and end with pudding.
I garnish with more whipped cream..and crumbled vanilla wafers. So keep on hand more whipped cream, if desired..or you can just top with crumbled vanilla wafers on the last pudding layer.