The woman, identified only as Natalia, confessed to the crime and faces up to 15 years in prison.
She stabbed her boyfriend Alexei in the liver with a kitchen knife at their home because he was being abusive to her cat.
Alexei died from his injuries as he was being rushed to hospital, according to police reports.
He recently moved in with his girlfriend but was left frustrated when he was not able to fix a broken television set. After three days of struggle he took his rage out on the cat – named Vasili – and his partner reacted with fury.
Police are pressing murder charges. The cat is reportedly alive and is being looked after by the couple’s neighbors in Perm, Russia.