HUBLK-030 My extremely timid sister-in-law obeys me completely! I have a sister-in-law I really can’t stand, so I always bully her! We’re doing a forced swapping arrangement with my sister-in-law’s couple, me, and a casual partner.

My timid, serious sister-in-law and I, who am very outspoken, get along terribly. I especially hate how her neat, innocent appearance makes both our parents and other people assume she is dependable. So whenever she tries to act like the older sister, I punish her with a slap. I also put her through humiliating same-sex training until she becomes completely obedient. And that is not all—I even get my boyfriend and her boyfriend involved in a swap. At first, the timid sister-in-law couple were tearful and confused, but they could not resist the waves of pleasure and gradually became more and more shameless. This is the true nature of serious sister-in-laws. I may hate my sister-in-law, but I have obtained the best toy, so I do not think I will get bored anytime soon.