"Haa... that was so refreshing. Don't you think so, Sister?"
Having finished her massage, Yorihime felt light and rejuvenated. She turned to Toyohime, but noticed her sister looked strange. Not only did she look exhausted, but her gait was awkward.
"Yes, it was wonderful. My body still feels all tingly."
Toyohime replied quickly, trying her best to walk normally so Yorihime wouldn't notice anything.
"Really? I didn't feel anything like that. And Sister, why do you smell strange?"
Besides a bit of muscle relaxation, Yorihime felt nothing "tingly," but she did catch a peculiar scent coming from her sister.
"D-do I? It's probably just sweat. The massage made me quite hot. I need to go take a bath immediately."
Toyohime hurried away to avoid further questions. Yorihime watched her go, puzzled, and noticed a large wet patch on the back of Toyohime's yukata around her butt.
"Whatever. I'll go find Master."
Yorihime put the strange behavior out of her mind and headed toward Eirin's room, hoping for some quality time. As she passed a window, she saw Eirin's back. She appeared to be talking to someone on a bed. Yorihime stopped in her tracks, her eyes widening at the unbelievable sight.
Eirin knelt down, revealing Kars, who had been hidden by her silhouette. Kars was completely naked, and a massive, rigid cock stood tall between his legs. Eirin was stroking the shaft with her hand before leaning in to suckle the glans.
"Why is Master doing that to her child!?"
Yorihime was frozen in shock. The incestuous act was mind-boggling, and it didn't look like a first-time occurrence. Eirin looked incredibly practiced.
"How is it, Mother? Does my big cock taste good?"
"Mmm~ Kars's meat is delicious. I'm addicted to it. This life is truly paradise."
Eirin's answer made Yorihime cover her mouth. Her idolized master was a pervert who lusted after her own son's meat? How could this be?
"That's enough. Get on the bed. I can't wait to shove my cock into your pussy."
Eirin nodded and stripped off her outer robe, revealing sexy black lingerie underneath. The sight of love juices already leaking from her crotch made Yorihime's brain go numb.
Eirin crawled onto the bed and arched her back, presenting her buttocks to Kars. She shook her hips and kneaded her own rear, her expression one of pure, wanton lust.
"I can't take it anymore!"
Kars slammed his meat into Eirin's vagina. He climbed onto her back and began to hammer into her with primal force.
"How is it? Does the big cock feel as good as you hoped?"
"Aah-oh! It's so good! So powerful! My pussy loves it! Harder! Deeper! Make me even happier, Kars!"
Eirin wore a depraved smile, her moans filling the room and driving Kars to thrust even harder.
Yorihime watched the two silhouettes merge. She had a clear view of the cock slamming into Eirin's pussy, spraying love juices with every impact. Hearing her master scream in pleasure under Kars's assault, Yorihime felt something warm and wet sliding down her own thighs.
She knew she should run, but her feet were rooted to the spot. The image of the "perfect Master" shattered in her mind, replaced by this black-clad slut who was obsessed with her son's meat.
"Get pregnant for me again!!"
"Aaah! I'm going! I'm climaxing!!!"
As hot semen flooded Eirin's vagina, Yorihime watched the twitching meat pump fluid into her. Soon, the overflow began to drip down onto the sheets.
But it didn't end there. Kars began to thrust again in the pool of semen. He clearly had no intention of letting her go yet. Yorihime stayed by the window, unable to look away, her own hand slowly sliding between her legs to masturbate.