[a/n: advanced chapters on the other side (link in bio) it's getting good. Could be the last chapter of the rotation and I will focus on The Bloodied Lord of Lust next rotation. Sorry about that.
(Kaito's POV)
"O-One....chance?" I asked, "Mai, what you're asking....."
"Shhh..." Naoya said, kissing Mai's cheek, "Look at her, Kaito. Look at how willing she is, your sister. She wants you badly, do not break her heart like this. Also, her body is quite nice. Look at these breasts~"
She groped Mai's breasts gently, causing Mai to wince and let out a soft moan.
"Ah~" She let out
"Don't do that to her." I said with a scowl, "Naoya...!"
"Fufu~" Naoya winked, "So protective of her."
"Tch....." I said
"Enough of this, Kaito." Naoya told me, "Do it. This is the key to a better future with all four of us together. I don't care about the Zenin Clan, Kaito, I want you to be happy. And what better way than to have your sisters in the fold? They love you, Kaito. They always have, do not refuse them. Don't reject their feelings."
"I'm not....." I started, "But this is....."
"Ignore all of that." She said, "Just enjoy this for once."
I closed my eyes, clenching my fists, trying to figure out a way to defuse this.
"Fufu~" Naoya said, "Just sit there like a good boy then~"
I opened my eyes to see that Naoya was whispering something to Mai's ear.
Mai's eyes widened slightly, "O-Okay...."
Mai leaned down to my crotch, reaching for my cock. As a response to this, I grabbed her hand quickly.
"Mai...." I said, "That's...."
Mai looked at me, "Y-You don't want this, Onii-chan?" She asked, "Please, just let me do this...."
I reluctantly let go of her hand, "Mai, this is not right."
Mai pulled out my cock as Naoya was watching, "It's okay..." She said, "Just....relax..."
"Lick the tip first as you slowly stroke it." Naoya said with a smirk, "Get that thing nice and erect."
Mai was blushing fiercely, "O-Okay...."
She licked the tip and began to stroke my cock slowly, her eyes looking right at me. I felt the way my cock was slowly getting erect from this, the stimulus clearly affecting me.
"Mai...." I said, my body shuddering slightly
"Good girl~" Naoya said, "Nice, just like that. Keep going~ Rub his balls gently too."
Mai closed her eyes, still licking the tip as she jerked me off slowly, her other hand going on my balls and rubbing them slowly. My cock was already rock-hard from this, feeling her soft hand slowly stroking me.
She opened her eyes, "So....big...."
"Yes~" Naoya said with a chuckle, "Take it into your mouth, Mai~"
Mai opened her mouth and took the tip into her mouth, her tongue gently swirling around it as she began to jerk me off. My body was beginning to tremble slightly due to the pleasure.
"Mai...." I said, reaching for her cheek, "You...."
She looked at me, her eyes were full of bliss and lust, "Onii-chan....." she said, "I love you....."
She then took the entire thing into her mouth, the tip of my cock rubbing against the back of her throat. I heard as she gagged slightly, but that didn't stop her from sucking me off, her head bobbing up and down.
Naoya grabbed the back of her head, "Good~" She said, "Just like that~ Let that cock stretch your throat out, good girl~"
Mai was sucking me off, deepthroating my cock with no issue as she had her eyes closed. The sounds she was making were very arousing and that was embarrassing to admit.
"SLURP! SLURP! SLURP!"
She didn't stop, her head was still bobbing up and down as Naoya had her hand on it, guiding her. i saw the way my wife was looking at me; wearing a satisfied smirk.
"Ah....." I said, leaning back, "Wait...."
Mai pulled away, gasping for air, "A-Ahh~" She said, her moan was soft and arousing, "O-Onii-chan....."
"Good girl~" Naoya said, "Now...."
She leaned her back and spread her legs, exposing her crotch and displaying her panties. Mai covered her face with her hands, clearly embarrassed by this.
"What the hell are you doing?" I asked, "Leave her be."
"Look at this~" Naoya chuckled, gently touching Mai's crotch, "She's so wet, Kaito~"
I looked at Mai's panties, there was a stain on it. The moment I looked at this, an arousing feeling filled my entire body.
Naoya then began to undress Mai, gently rubbing her waist with her hands, "Get comfortable, Mai-chan.." She said as Mai was left in her underwear, "Lay your head down on my lap and enjoy the sight of my nice and big breasts~"
Mai did as she was told, lying her head on Naoya's lap as she was blushing deeply, her arm covering her chest while her other hand was covering her crotch.
"What is this?" I asked
"She sucked you off." Naoya smirked, "Return the favor."
"What?" I asked, "You're insane."
"That line is already crossed, Kaito." She said with a chuckle, "Do it. This is no different than what we normally do."
"I know, but....." I said
"Would you please shut the fuck up and just do it?" Naoya said with an annoyed tone, "Your sister is waiting."
"Please, Kaito....." Mai said softly
"Fufu~" Naoya leaned her chest down to Mai's face, "Get a nice feel of Nee-chan's tits, Mai-chan."
Mai slowly reached for her breasts, gently groping them as Naoya smiled warmly.
I looked at Mai's crotch, the stain on her panties was very inviting.
I gulped, "Fine...." I said as I reached for them and took them off, "I'll...."
I spread Mai's legs and leaned down to her pussy, gently running my tongue against it.
"A-Ahh~" Mai's body shuddered
"Go on~" Naoya urged, "Do it~"
I sighed and inserted my tongue into Mai's pussy, feeling how her body trembled in pleasure.
"Hmm~" Mai moaned softly, "K-Kaito...."
I began to eat Mai's pussy out, feeling how her pussy was clenching down onto my tongue. Her juices were overflowing and drenching my mouth in no time. I had my hands on her thighs, gently rubbing them as I ate her out.
"Fufu~" Naoya said, "Good boy~ This is a beautiful sight, Kaito-kun~~"
"A brother and a sister enjoying themselves~"