Since her father left their home and her mother died, Pil-Jung (Hyun Jyu-Ni) has taken care of her younger sister. She dreams of having an ordinary life, including becoming a PE teacher, marrying a nice man, and having children. Her life changes after she marries Tae-Sub (Kang Seo-Joon), who has a son Min-Ho (Gil Jung-Woo). Tae-Sub goes bankrupt and causes trouble, but Pil-Jung struggles to get out of the problems caused by Tae-Sub. One day, Tae-Sub suddenly dies. 7 years later, Pil-Jung is busy doing odd jobs to support her son Min-Ho and daughter Min-Ji (Hong Je-Yi). Pil-Jung is happy with her life as single mother, but Min-Ho and Min-Ji want to have a father who is cool and rich.
“Mom Has an Affair” takes over SBS’ weekday 08:40 time slot previously occupied by “Want a Taste?.”