(Kaito's POV)
"I can explain, Kaito!" Mai said, covering her crotch, "T-This....!!"
I pulled my pants up, "This better be one hell of an explanation, Mai!" I said, "Why are you in the closet? Wait, were you watching the whole time?!"
Mai's face was completely red, "N-No, that's not....!!" She started, "Kaito!"
"It sure looks that way!" I said, "What are you doing, Mai? W-Were you masturbating too?"
Mai curled herself up, "I...wait...!" She stammered, "S-Stop, wait...!"
"Ah...." Naoya walked up to us, "Well, this is awkward."
I looked at her, "You knew she was there?" I said, "You knew I'd let my guard down with you???"
Naoya sighed, "Yea...."
"Why would she be in the closet, watching us get intimate?" I asked, "Naoya, what kind of sick game is this? To have my own sister masturbate to us having sex!"
"Well..." Naoya started, "It's not like this is the first time she's done it."
"What?" I said, "What are you talking about? Stop being ridiculous!"
"Tell him, Mai-chan." Naoya smiled, "Tell him how you masturbated to him while he slept."
I looked at Mai, "What is she talking about, Mai?" I said, "You better answer me. Now."
Mai looked at me, a flustered look on her face, "I.....well...."
"Don't be shy now." Naoya said, "Go on, my dear. Tell him the truth."
"It happened once." She said softly, "I....I was just curious at the time, how it felt. I didn't mean for you to be the focus of that curiosity."
I blinked, completely speechless at this.
First, it was Maki who caught us having sex. Now, it was Mai masturbating to me. All of this happened when they were young, possibly molding their mentalities as they are now.
"What?" I said, not knowing what else to say, "Mai...."
She looked down, hugging her knees, "I'm so sorry." She whispered, "I'm such a creep....and....god, I hate myself so much..."
"Mai...." I said, "Wait...I'm sorry, all of this is too much for me at the moment."
"I told you, Kaito." Naoya said, "You see, I am quite smart. The reason these two were always so rude to you was due to a few reasons. Obviously, we cleared up some of them. They really don't like me for the same reason they've been angry at you, my dear."
I looked at her, "What the hell are you saying?"
All of this was too much to process, I didn't know what she was saying due to my mind finding it hard to focus.
"They have sexual feelings for you." Naoya said with a smirk, "Such young and pretty girls, being young and curious.....hearing that their brother will marry their cousin. Obviously, if this type of incest is acceptable, then maybe brother-sister incest would be fine too, right?"
I looked at Mai, "Mai...." I said, "Is this true?"
Mai didn't say anything; she was looking down and trembling slightly.
"Say it, Mai." Naoya said, "Tell Kaito how you really feel. All of these years, you've been repressing that emotion. You've been envious of him, haven't you? He has the same Cursed Technique as you, but is superior to you. But not just that, you've been envious of me. You know that you will never have the big brother you've loved all of this time. So you grew to resent both of us, Kaito the most. But you resented him more because...he never realized that you felt like that."
"Shut up...." Mai's voice was soft, "Please, shut up."
"You need to let your true feelings out, Mai-chan!" Naoya scowled, "Why let yourself stay at the bottom like that?!"
Mai didn't say anything, she simply sobbed as she hugged her knees even more.
I crouched down, placing my hand on her knee, "Mai...." I said softly, "Don't cry. Please, don't cry."
"D-Don't touch me...." She wept, "Leave me alone..."
"No." I said, "I'm done letting you cry alone."
"Stop it." She said shakily, "Don't pretend you're fine with this. I'm....I'm sick in the head."
"No, that's not true." I said, "Look at me."
She slowly lifted her head up, looking at me with tears in her eyes, "Kaito...." She said, "These feelings are wrong. I'm so sorry...."
I wiped her tears away, "They're not." I said, clearly trying to make her feel better, "We don't chose who we love. Mai, it is okay."
"It's okay, Mai-chan." Naoya wrapped her arms around my neck, "Let's continue, Kaito-kun."
"You're not serious, are you?" I asked with a frown
"Shhh...." She placed her finger on my lips, "For once in this marriage, fuck me hard while someone watches, hm?"
"Naoya." I said, "This is not a servant girl from the estates nor a random civilian woman. This is my sister who is going to watch. Could you be more vulgar?"
"This sister of yours wants you." She said, "She cannot admit it now, but let her watch us first. Then, afterwards, I'll have her confess to you."
She stood up and pulled me up with her, closing the closet door gently as she smiled at Mai. I could see that there was a some slits that Mai could look through.
Naoya pulled me back to the bed, giving me a smile, "Don't be nervous, love." She said, "It's okay."
"That's my sister, Naoya!" I exclaimed, "How can you be so calm???"
"I'm your cousin, Kaito." She smirked slightly, blushing, "And I watch you fuck other women, you know? How's this any different?"
"It's Mai!" I said, "We just made up after years of animosity, Naoya. And now you're-"
"Pretend she's not there." She patted my cheek, "Just focus on me, Kaito. We're going to make a baby, remember? That's what you want, right? You want to be a papa, right? Put that hard and meaty cock into me and pump me full of your hot semen, my love."
I closed my eyes, "Naoya, it's not so simple...." I said, "You're asking me to pretend she's not here? I know she's clearly there!"
"I told you, Kaito." She said with a smile, "How is this any different than me watching? Pretend I am another woman and Mai is me, okay? If it's like that, then you can do it."
"I cannot." I said, "If I want to put a baby in you, I need to know that is you."
"Then just focus on that." She hugged my waist, "Please, I beg you. Do it for me."
"For you....?" I asked
She blushed, "I love you so much." She said, "And you love me so much."
"I....I do...." I said, reaching for her cheek, "I do love you."
"Yes, lover...." She chuckled, "I know that. And you underestimate how much I love you. I want you to be happy and I am willing to mend the rift between the twins and me."
"This is the way."