Ask a Lawyer and Get Answers to Your Legal Questions
Supreme Court Rule 402. It is a conference between the prosecutor, the defense attorney, and the judge. It is a settlement conference of sorts. The judge learns facts about the case and the defendant that he/she wouldn't ordinarily hear except at a trial. After listening to the facts and the aggravating and mitigating circumstances, the judge says what he/she would sentence the defendant to if he pleaded guilty. The defendant may still reject the offer by the judge and go to trial.
As you can see, the conference is one between all of the parties involved in your case except you. At that point everyone kind of puts her cards on the table and the judge gives everyone an idea of how they see the case resolving. You do not have to accept it. I am assuming that you have an attorney. I would certainly have a conversation with your attorney to find out what happened and what your options are.