
Ji-seon is living with her sister and her husband after a divorce. Her sister Ji-yeong leaves for a work trip (but is actually meeting her lover) 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...
Cheating Notes

The wife goes on trips to meet and fuck her older lover (her boss?), but she tells her husband that they're business trips. Meanwhile, her sister starts living at her house after her divorce. So when the wife is away during her 'business trips', her sister and her husband also fuck.
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