When my brother got married and brought along Shizuka, she seemed like a gentle and kind woman. I fell in love with her at first sight. Since then, for over a decade, I've secretly harbored feelings for my sister-in-law Shizuka while living my life. The turning point for me came a few months ago. Due to work, I ended up staying at my brother's house. Their children had already left the nest, and my brother and his wife welcomed me warmly. When I arrived home after a night shift, I heard Shizuka's troubled breathing. Yes, she was lonely and seeking comfort. Seeing her embarrassed state, I panicked and, saying sorry, quickly headed to my room. Later, Shizuka came to my room, looking embarrassed. Interrupting her attempt to speak with a hesitant 'Um...', I confessed, pouring out my long-held feelings, that I had liked her for a long time. After a long silence, Shizuka held my hand and nodded. We naturally embraced, kissed, and our bodies came together...