ACZD-178 The Training Records of a Masochistic Sibling Pair

This video is a post from a man who trains incestuous sister and brother into sex slaves. Mari and Yuta (both are pseudonyms) were originally the children of my sister-in-law, but since they died in an accident, we, a childless couple, adopted and raised them. My wife was a masochist, and I am a sadist who trained her to be a love slave. A few years ago, my wife passed away from illness, leaving me to live with Mari and Yuta. Soon after, I discovered the truth about their incestuous relationship. Although they are not directly blood-related, they are still my late wife's niece and nephew. Such a sister and brother engaging in disgusting incest as masochists, even torturing each other. When I found out their secret, the sadist within me began to whisper: "Make them happy, ×× (my wife's name). Like you, Mari and Yuta are perverted masochists." "This sister and brother pair are top-tier M's. The ×× family line should all be slaves." "You need to dominate these two masochists and lead them to happiness." Before I knew it, I started training Mari and Yuta. When I played with Mari in front of her brother, she let out a beautiful moan. "Don't look...Yuta," she said, but Mari's vagina was tightly gripping my penis. Seeing this, Yuta's penis hardened to the point of touching his navel and leaked pre-ejaculate fluid. "What do you mean don't look? Your vagina is clearly constricted like this. Yuta, does sister's vagina feel good? You've penetrated that erect penis many times before, right?" "...Yes." "Mari, Yuta, you should know that from now on, you're not allowed to have sex by yourselves. Mari's vagina is for me to use, and Yuta, I'll introduce a new woman to you, a cute doll." Listening to my own words, I ejaculated inside Mari. Then I made her perform facial riding and ordered Yuta to lick clean my penis. "Look, Mari, you need to clean this contaminated penis with your love juices." Following the taught method of oral service, Mari didn't use her hands but sucked out every drop from the base of the penis to the semen, carefully licking clean the contaminated testicles and pubic area. "Yuta, does the semen mixed with sister's love juices taste good? But just licking isn't enough; you need to make sister cum, making her feel pleasure." "Understood." "Mari, you're being cleaned by Yuta with his tongue, and at the same time, you need to jerk him off. Then, cum again on my penis." Listening to my words of domination, my penis regained its vigor, entering Mari's throat, and she followed orders to reach an orgasm. As sex slaves dominated by me, the two seem happy. In the future, I plan to raise this sister and brother pair in an even deeper hell of incest.