KSBJ-217 My brother's wife was a born slut... Tōrin.

Film Introduction

While my husband is on a business trip, my sister-in-law Rin brings a man home to commit adultery. My brother doesn't know that she's an incorrigible slut. Her advances started coming my way too. At first, she would masturbate in front of me for fun, but her actions escalated! She had sex with her lover in front of me and eventually started coming to my bedroom at night…