When I visited my wife's parents' home, her mother Mio looked as beautiful as ever, making my heart race. Since they had an event to attend, both my wife and Mio were sweating from the commute. When my wife mentioned she hadn't brought a change of clothes, I went to get her bag—only to be instantly captivated by Mio's figure. That night, after dinner, my wife went to bed early, leaving me alone. Just then, Mio returned slightly tipsy and invited me to have a drink together. As we spent time side by side, our conversation grew deeper, and her moist eyes stirred something inside me. Our distance gradually closed until we were gazing into each other's eyes, and naturally, our lips met. We crossed the line, becoming lovers. The next morning, I cautiously exchanged greetings with Mio, careful not to alert my wife. She quickly slipped away from the living room. Glancing at the trash can, I spotted traces from the night before. I swiftly hid them, then went to see Mio. Handing her the remnants of yesterday, I pulled her into an embrace, confirming that neither of us regretted what had happened. Since then, our secret trysts have continued frequently. Soon, preparations will be underway for the three of us to begin living together.