After watching Eirin and Kars finish, Yorihime slipped away into the night. The cool breeze helped lower her body temperature, but the fire inside her remained, especially the throbbing in her pussy.
The revelation of their relationship was a massive blow. "Why would Master do such a thing?"
She couldn't understand it, but she knew she couldn't ask. Aside from the embarrassment, asking about such a thing was social suicide. She pictured Eirin's face as she was being fucked.
"Is that cock really so amazing that she'd ignore their relationship?"
It seemed the only logical explanation. If even her master could be turned into a mess like that, that meat had to be something extraordinary.
Yorihime wandered the grounds, trying to clear her head, before returning to the guest room. When she entered, she found an unexpected guest in her sister's bed.
"Kars? Why... why are you here?"
Kars was tucked under the covers, being held by Toyohime.
"Kars wanted to sleep with me, and I felt the same, so I said yes," Toyohime explained.
Yorihime wanted to scream. She wanted to tell her sister that the boy she was holding had just finished a marathon sex session with their Master. From what she'd seen, he was an experienced predator with an insatiable appetite. Letting him sleep there was dangerous.
But she couldn't say it.
"Maybe I'm overthinking it. He wouldn't do anything to a 'Big Sister' he just met, right? And Sister wouldn't agree to it. Besides, he must be exhausted after Master, right?"
Reassured, Yorihime lay down to sleep.
Under the covers, however, Kars was completely naked, pressed against Toyohime's bare skin. He was kneading her breasts while his hot cock was clamped between her thighs, rubbing against her pussy until it was soaked in her love juices.
Toyohime's face was beet red. She looked at Kars with pure doting affection. "You have such an incredible libido, Kars. But it would be bad if Yorihime found out, so be very quiet, okay?"
"I know. I'm going in, Toyohime."
"Wait a moment..."
Toyohime looked at the still-awake Yorihime, but Kars didn't wait. He drove his meat into her wet vagina, making Toyohime bite her lip to stifle a scream.
"Mmm~ I told you to wait... you're so impatient... ah~ being fucked right next to my sister... it's too much..."
The tension of potentially being caught made Toyohime's pussy incredibly tight, sucking on Kars's shaft with every movement. Kars found he couldn't stop; he wanted to go even faster.
"Nnggh~ slower... Kars, slower... it's too fast... I'm going to lose it..."
Toyohime watched Yorihime's back nervously. She leaned down and kissed Kars deeply, turning her moans into the wet sounds of a messy make-out session.
Yorihime, far from being asleep, was wide awake. She heard every rustle and muffled moan. The realization that her sister was also sleeping with Kars was another shock to her system.
"Ah~ it's coming... I'm climaxing..."
"I'm cumming too, Toyohime."
"Mmm~ then let's go together. Shoot all that hot semen inside me. Let it swim inside my uterus~"
Yorihime couldn't believe those words were coming from her sister. The lewdness of it made her own pussy ache. She, too, wanted to feel that pleasure...
As the semen flooded Toyohime, her body shuddered under the blanket. She kissed Kars fiercely, letting out muffled grunts of delight. Yorihime expected it to end there, but Kars didn't stop. He grew even more aggressive.
"Does this guy never rest?"
Yorihime was stunned by his stamina. Kars was now straddling Toyohime, hammering into her vagina until her expression became one of total depravity. At this point, Toyohime didn't even care if Yorihime found out. She just wanted to be a female animal, consumed by pleasure and the cock.