I live together with my wife and her mother, Ryouko. Ryouko has big breasts and sometimes makes troubled, alluring expressions. I find myself drawn to her, but I keep it a secret from my wife. One day, while putting her clothes into a dresser, I found a vibrator hidden inside. Since her husband has already passed away, I wondered if she was lonely or using the vibrator to comfort herself—I got slightly excited, but she caught me red-handed and I panicked, trying to run away. Instead, Ryouko calmly approached me with a smile, took my hand, and whispered that while loneliness could be eased with a vibrator, toys alone couldn't fulfill her. Then she said, "I'll keep this a secret from your wife," and pressed her lips against mine.