Mother's Friend 2 (2018)

Original title: 엄마친구들 2

Do-won is a twenty-year-old who lives with his mom. However, he is secretly sleeping with his mother's friend Eun-ji who lives next door. One day, his mother's junior's husband dies and she moves into the neighborhood. Since then, his mother and her friends see alot of each other and So-jung who misses having a man, starts seducing Do-won...