Hello.His aunt suffers Confusional Syndrome
and delusions). The confusional syndrome is a psychic pathology that appears in 25-30% of hospitalized older than 65 years.The psychic pathology is the result of physical pathology(complicated infection in this case).
Although the situation of her aunt is very serious,if it resolves the physical pathology, will resolve the psychic pathology.
I wish you good health.
(In case the answer would have been useful please indicate this)