72). She sounds very calm and is clearly affectionate towards her son in trying to reassure him that all people die and things happen but life must go on. She does not sound in any way as if she had plotted out the killing of King Hamlet.
An excellent example of why the Queen has no idea of what is being plotted is in act 4, scene 7 in the confrontation between Laertes and Claudius. They are planning to kill Hamlet in a fencing battle. Laertes's objective is not to kill him with honor and dignity but to be cheap and evil. Their plan is to poison the tip of the sword and strike Hamlet with it at some point in the battle. There is even a back up plan to fill the cup with a pearl (that is later on very important) that will also poison Hamlet if the sword plan is not successful. Immediately after this meeting the Queen enters and the King lies to her by saying "How much I had to do to calm his rage! /Now fear I this will give it start again. /Therefore, let's follow." (Act 4, sc 7, l. 219). He bluntly lies to his wife that he loves. He does not want to tell her the truth because he knows that if he were to tell her the truth she would not agree with it, and easily take Hamlet's side and that would then ruin the master plan. She deeply loves Hamlet and would do anything for him. This proves to us that Queen Gertrude had no part in any plots against Hamlet. .
In the dialogue between Gertrude and her son in act 3 scene 4 we get an excellent proof that Gertrude had no part in the poisoning of the King. Hamlet enters his mother's room so certain that his mother had a part in the killing. He has the thought of her marrying Claudius so soon after his father's death in his mind. He bombards into her room and questions her with rage. He is so enraged that he kills Polonius who is hiding behind the curtains. He believes that if he continually accuses her of being part of the murder that she will eventually give in and confess but she never does so.