In large bowl, whip heavy cream until soft peaks form. Fold in sweetened condensed milk until it is fully incorporated.
Mix in milk and vanilla extract. In the bottom of a trifle bowl or individual glass serving bowls or glasses, put a layer of pudding mixture, a layer of Nilla wafers, another layer of pudding mixture, and a layer of bananas.
Repeat in this order until all of the ingredients are used. Refrigerate for at least 8 hours before serving.
Notes
*Since there is no egg in this pudding recipe, the mixture is a bit pale in color. You may add few drops of yellow food coloring if you prefer