spoiler
he didn't cheat on her. she followed him and saw him accompanying a woman. later on he just drops off the woman at a hotel (she was just a co-worker or sth i think because she called him sunbae). afterwards he goes to a supermarket to buy some a bunch of food condiments. turns out it is for his father who has been living alone in the woods. the father left the family because of an argument with the mother due to his failed business. like she literally told him to die.
So? What happened later? I mean what Fl did when she saw how he went a hotel with somone? Please give more spoiler you are hero for me ヾ(❀╹◡╹)ﾉ~
he dropped the woman off in front of the hotel, she left his car and he just drove off right away(to the supermarket). that's when the wife's suspicion about him cheating on her disappeared.
Why I feel like her husband told lie to her and cheated her while he told how he went a business trip? Any spoiler?????