The Seductress Professor's Revenge

The heroine Sarah discovers her husband is cheating with her best friend. She takes revenge by slapping her friend in the face and seducing her friend’s son in a morally transgressive act, then retaliates against her scumbag husband.

She also uncovers a long-buried truth: the scumbag and his family deliberately approached her for her wealth. She uses her revenge to destroy the three wrongdoers, successfully avenges her mother, and finds love.