Swarnalatha, who was very fond of her cat, poured kerosene and immolated herself at her house after her pet died two days ago, reportedly in the rains lashing the city, they said.
A purported suicide note was found which stated that she was ending her life after the death of her cat and that she was unable to save it's life.
The Amberpet police has booked a case and is investigating further into the matter.