I don't know if you have the means to do so, but you might want to consult an attorney as to her prospects and your options. You are in a tricky situation and need local competent legal advice. Involuntary hospitalization and the admission into and discharge from involuntary inpatient psychiatric care are performed according to protocols dictated by law, and if you don't know your (wife's) rights, your trip could quickly become protracted, traumatic and expensive.