Who is Betty Osbourne from the novel, An Imperfect Spy?

Betty Osborne was a student in one of Kate's classes on Thomas Hardy and wanted to pursue an academic degree, but she made the mistake of choosing the wrong man to marry. She was a secretary at the Schuyler Law school when she met her husband during a dry spell. After they married, he started drinking again and became abusive.

She takes back her life one night by killing him. She sees herself as a Hardyesque heroine.