Mix pudding with milk until smooth; stir in chopped bananas and set aside.
In a large bowl, whip cream until nearly stiff peaks form. Blend in vanilla and sugar until peakes form carefully.
Build layers by placing half of the pound cake cubes, followed by half of pudding, half of whipped cream, and half of crushed wafers into a trifle dish. Repeat with remaining cake, pudding, cream, and wafers. Top with extra wafers.
Chill in the fridge until ready to serve.
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