A woman was arrested for fatally stabbing her grandfather 41 times — then leaving his naked, bloodied body lying in their kitchen.

Philadelphia cops collared Patricia Diocson, 22, Monday for killing 80-year-old Robert Girard last Wednesday night, the Philadelphia Inquirer reports.

Diocson had originally called police saying she’d come home to find her nude grandfather dead in the house they share. There was a trail of blood leading to his second-floor bedroom and there was no sign of forced entry, cops told the paper.

But police later found security footage showing she was the last person to enter the home, NBC Philadelphia reports.

She has since admitted to stabbing Girard, CBS reports.

Diocson claims he abused her, according to the Inquirer.