Unfortunately it is part of the illness process in some cases to deny psychosis or to question the diagnosis and medications. It's not at all uncommon in bipolar. Sometimes people have to literally hit some kind of bottom in life like I did before they will accept they have a psychotic illness.
What I still don't understand is why fake taking meds to the psychiatrist? Are you afraid he will stop prescribing the meds you want if you tell him the truth about not taking Rexulti?