How does the actors’ play in Act 3 Scene 2 portray the marriage between Hamlet’s mother and father? What could potentially be Hamlet’s purpose for choosing this scene?

On stage, the basic form of the alleged murder is repeated: a king and queen are shown happily married; the king takes a nap; a poisoner enters and pours something in the king’s ear, killing him; the poisoner than takes possession of the queen. Hanlet's purpose in choosing the scene is to expose his knowledge of Claudius' actions.