Hello, thanks for the query. Can you elaborate what exactly you mean by use of term delusional? Is your mother still in hospital or discharged? Based on my impression; Your mother is suffering from a condition known as delirium which has occurred in her case due to fluid-electrolyte imbalance/hepatic damage/blood dyscrasis (in simple terms, some changes in body s balance/homeostasis). Delirium is characterized by altered sleep-wake schedule, intermittent bouts of suspiciousness, ill formed delusions, hallucinations, impaired activity or overt aggression alternating with periods of normalcy (known as lucid interval). Treatment of delirium is diagnose & treat underlying cause; hence get her to a hospital immediately & request doctor to assess her for delirium using a simple tool known as mini mental state examination (MMSE). She will get better soon. Good Luck