Back in June, High Court judge Jessie Lesiit ruled that Ruth Kamande, 25, killed Farid Mohammed in cold blood after stabbing him 22 times following a domestic dispute.
Kamande has been in custody since 2015 when she was arrested.
Last year, she sat the Kenya Certificate of Secondary Education examination at the prison and scored an A-. She is now a trained paralegal.
Lesiit ruled that her actions proved that she had malice when she killed her boyfriend.
She said the prosecution had proven beyond all reasonable doubt that Kamande committed murder.
Kamande said she stabbed Mohammed in self defence. However, a key witness who was present when she killed him discredited her claims.
The witness told the court he heard Mohammed screaming for help. He went near a window, but Kamande followed him and stabbed him again, he said.