Ji-seon is living with her sister and her husband after a divorce. Her sister Ji-yeong leaves for a work trip and Ji-seon is at home all alone with her brother-in-law. The two can't hide their sexual passion and they cross the line. Every time Ji-yeong leaves, the two enjoy risky sex...
Unfortunately the movie My Wife's Sister is not yet available on HBO Max.
| Directing | Lee Sang-woo | Director |
| Writing | Lee Sang-woo | Writer |
