I have been served a citation that appears to give my wife of 53 years up to guardianship of others

If you are her spouse, you have priority and should have been sent a Waiver of Right to Appointment.  You do not need a lawyer to object to guardianship:  write the Court.  If you fear that a guardianship will be awarded and want to be the guardian yourself, hire an Approved Guardianship Attorney.  If your local court does not have a list, check the State Bar of Texas website.  Note that attorneys are registered in one county but often also practice in surrounding counties.