Enter King, Queen, Rosencrantz, and Guildenstern:
The Queen has gone straight from Hamlet to the King, and finds him with Rosencrantz and Guildenstern, who have been looking for Hamlet. She is obviously in a state of emotional turmoil, and the King says, "There's matter in these sighs, these profound heaves: / You must translate" (4.1.1-2). Apparently the Queen feels a need to be cautious about her news, because the first thing she does is ask Rosencrantz and Guildenstern to leave her alone with the King.
As soon as Rosencrantz and Guildenstern are gone, the Queen begins to shade the truth. She says that Hamlet is as "Mad as the sea and wind, when both contend / Which is the mightier" (4.1.7-8), which she may truly believe, but which also is what Hamlet wants her to say. She does not mention that Hamlet said he was only "mad in craft." She goes on to tell how Hamlet killed Polonius, and the King immediately sees that if he had been behind that arras, he would have been dead. He's also worried that he will be held responsible for what Hamlet has done, because he should have kept Hamlet under control.
Then, when the King asks where Hamlet is, the Queen apparently tells a very big lie. She answers:
Re-enter Rosencrantz and Guildenstern: