Raped in front of my husband - brother-in-law's trap

Yuki hated her master's younger brother, who didn't get along well with him. One day, my brother-in-law suddenly came to Tokyo and said, ``I'd like you to stay for a few days while I'm on a business trip.'' Yuki violently criticizes her husband who readily consents. However, my brother-in-law's purpose was not a business trip...