After taking a proper break for the first time in a while and returning home to my parents' house, I was greeted at the door by my older brother's wife, Kaoru. With my parents and brother absent, we unexpectedly found ourselves alone together. Catching glimpses of Kaoru's lingerie and seeing her while she bathed made my heart race, and that night, I made my way to my brother's bedroom. I passionately kissed Kaoru, wearing cute lingerie, sucking on her lips and her nipples visible through the sheer fabric, then slid my hand toward her hidden depths without my brother ever finding out. An inevitable, natural progression ignited a new flame between us.