A married woman's cheating after a couple's fight - a married woman who goes to be hugged by her neighbor

Fifth year of marriage. Today I had a fight with my husband over a small matter. I wonder how many times this month...I wonder if we're no good anymore. It seemed like a distant past that we had laughed at silly things. "Is your wife okay?" Kazuya, who lives next door, called out to me. I was happy to be kind to someone other than my husband. As I listened to my complaints, I realized that my heart was gradually shaking.