In the first scene when Gertrude tells Claudius about her meeting with Hamlet, she keeps her promise to Hamlet by not disclosing what he has told her and that he is faking his madness. Surprisingly though, she shows no signs of revulsion towards Claudius even though she has just learned that he is a murderer. It is as though she has not actually understood what Hamlet had tried to tell her.
She doesn't ignore Hamlet's fears about being sent to England in the company of Rosencrantz and Guildenstern and asks the King to find an alternative to sending her son to England with them. She does however agree with Claudius that it is important to get Hamlet away.
In scene 2, Hamlet shows his true feelings for Rosencrantz and Guildenstern and criticizes them for not being aware of how they are being used by Claudius. He tells them that the king keeps them around "as an ape doth nuts, and in the corner of his jaw; first mout'd to be last swallowed."
In Scene 3, Hamlet continues his state of "madness" and refuses to tell the wherea