Although both brothers are married, they are likely feeling frustrated with their wives and longing for something new, so they have secretly been involved with each other's wives. The younger brother waits for his brother to go out and begins a clandestine affair with his sister-in-law; of course, they had feelings for each other beforehand, which made it easy for them to be intimate. Meanwhile, when the older brother goes out, it's precisely the time when he arranges to meet his younger brother's wife at a motel. These are truly ironic relationships, but perhaps this is what brings them happiness and helps them find their true soulmate.