My Girlfriend's Mother is an AV Actress - Chapter 29

 The Masochistic Slut-Training Session That Begins Right Under My Sister's Nose

"Beast, horny monster, pervert..."

Yep, I have absolutely zero room to talk back.

I was caught red-handed by my little sister Erika right as I stepped out from having restroom sex with Honami-san. We were both completely naked, and Honami-san was dripping the semen I had just creampied into her down her thighs, making the evidence absolutely airtight. To top it all off, we even had explicit testimony against us: "I've already received a creampie, so I'll hand him over to you now. It sounds like Kagawa-kun is going to subject you to a masochistic slut-training session, so you better get naked quickly too..."

"Hey, Big Brother. Why on earth are you having sex with Big Sister's mom too?"

"Ah, well... you see, there are various reasons behind this..."

"Hah? Cheating on Big Sister when she's right here is completely unacceptable. Why don't traitors like you just drop dead?"

Yes, you are entirely correct. I have no words to offer in my defense. Though, it's not exactly cheating... it's actually mutually approved cheating...

"Erika-chan, please don't be so angry with Shota-kun, okay? I already know all about him having an affair with Mom."

"You can't defend him, Big Sister! This piece-of-shit brother is taking advantage of your kindness to do something this horrible."

Wow, this is the first time Erika has ever called me her brother. And she even tacked "piece-of-shit" onto the front of it. I've been forced to sit perfectly straight on my knees on the living room floor clad in nothing but a single bath towel, undergoing a trial by Chief Justice Erika. Needless to say, the verdict is a choice between guilty or super-guilty.

Uh, excuse me, but the victim sitting right next to you is pleading innocent on my behalf... Look, Erika, if you go and force a breakup between me and Hitomi-chan, you'll lose your connection to her entirely. That'd be a problem for you, right? Come on, tell me it would be a problem. Ah, please put the smartphone away. Stop pretending like you're about to call Mom while smirking at me like that.

"Erika-chan, I really, truly don't mind... In fact, it makes me happy when Shota-kun handles me roughly... Because I'm a slutty bitch slave undergoing a masochistic slut-training session by Shota-kun..."

Hey, you really don't need to disclose that kind of information... Wait, Erika's demeanor just blatantly shifted.

"Big Sister is a slutty bitch slave... masochistic slut-training?"

"Yeah, that's right. It looks like I have a really strong masochistic streak, so Shota-kun gives me lots of discipline."

Erika is fidgeting with her ears flushed bright red. Ah, this chick is jealous. On top of having a lesbian streak, this is... I can't quite tell if she wants to become a masochistic slut herself like Hitomi-chan, or if she wants to engage in a masochistic slut-training session with Hitomi-chan herself.

"My, Erika-chan, are you interested in Hitomi-chan's training session?"

The one who cleanly cut right into the atmosphere of the room was, naturally, Honami-san. Having her core desires exposed so suddenly, Erika panics.

"Ah, no, well, um..."

"In that case, Hitomi-chan, since we have a rare opportunity, why don't we let Erika-chan watch while you undergo your training?"

"Okay!" 

"Eh?" 

"Eeehh?!"

By the way, those reactions came from Hitomi-chan, me, and Erika, in that exact order. Since I'm well-accustomed to Honami-san's antics, I was the least shocked of the bunch.

"It's a little embarrassing, but would you watch me while I get trained and violated by Shota-kun?"

"Ah, yes. I will observe."

Overwhelmed by the momentum of the room, Erika instinctively nods along. I feel you, sis; the sheer force of this mother-daughter duo is overwhelming. It sweeps you right along like white-water rafting. It’s the flow of the Kamo River, the Suzumura mother-daughter duo, and a roll of the dice.

"Thank you, Erika-chan. Well then, I'm going to get naked, so just wait a moment... Ah, is it alright if I go completely naked, Master?"

"Yeah, that's fine. Sit on the floor once you're fully naked."

Taking full advantage of this saving grace, I slide right into Master-mode. Now that things have come to this, Erika has no choice but to watch with her eyes rolling in astonishment.

"Understood, Master. Erika-chan, please watch closely as your slave undresses."

Hitomi-chan generously strips off her school uniform down to her underwear, flashing a smile at Erika.

"If you'd like, I'd love it if Erika-chan undid them for me."

Yes! Good job, Hitomi-chan! Erika did mention earlier that she had been allowed to touch Hitomi-chan's breasts, so she must be dying of curiosity regarding this super-sexy body.

"U-Understood. Excuse me."

With movements so awkward you can practically feel her tension, Erika goes about unhooking Hitomi-chan's bra.

"Big Sister... your breasts are even bigger when you take it off..."

"Fufu, thank you ❤️ This is the first time I've had another girl undress me, so it's making me a little nervous ❤️"

This natural air of hers... she really is a master. Hitomi-chan is striking Erika's vital points with her words with absolute precision. If this were a manga, that girl would be shooting a fountain of blood from her nose right about now. It's blatantly obvious that she's sneaking in a feel of her breasts while undressing her.

"An H-cup is just insane... How do they even get this big...?"

"Thank you, but Mom is a J-cup, so she's actually bigger than me, you know?"

"Damn you... genetics..."

I feel you, I feel you. The power of genetics is cruel indeed. But hey, keep it together; you're considered quite the pretty girl yourself at school. Just keep your mouth shut, alright? Seriously, keep your mouth shut in front of Mom, got it? Once her upper body is fully exposed, Hitomi-chan wraps her arms around Erika and kisses her... Ah.

"Mnn? Nnn... ❤️ Nnn... ❤️"

Yeah, that chick definitely just...

"Mnn, nnn... ❤️ Ahfuh... ❤️ ...Puhah, I ended up surrendering my first kiss to Big Sister! ❤️"

Figures. 

I've never heard of her having a boyfriend before. A Hitomi-chan who casually steals someone's first kiss with a natural lesbian kiss is truly terrifying.

"Eh, ah, I'm so sorry... I went ahead without even checking... Having a girl as your first kiss must have felt totally gross, right?"

"No, if anything, having it be Big Sister is the absolute best, or rather, how should I put it..."

"Ufufu, it looks like Erika-chan is thrilled to have Hitomi-chan play with her ❤️ Wouldn't it be wonderful to give her a bit more? Look, Erika-chan, you still have some articles of clothing left to take off, don't you?"

Honami-san chimes in from the side with advice that is as precise as it is completely inappropriate. She's definitely completely analyzed Erika's kinks by now... Following the advice, Erika drops to her knees, hooks her fingers into Hitomi-chan's panties, and pulls them down. She's leaning her face incredibly close to her crotch, that chick.

"Ah... so this is Big Sister's... it's so wet and obscene..."

"Yeah, my pussy is already soaking wet. It's because I'm embarrassed about being watched by Erika-chan, on top of knowing that Shota-kun is about to subject me to a masochistic slut-training session... ❤️ Thank you, Erika-chan. Well then, watch closely while I get trained by Master."

Saying so, Hitomi-chan assumes a formal kneeling position on the living room floor and bows deeply.

"Master, thank you very much for granting me the opportunity to be trained today. Your slutty bitch slave Hitomi will now undergo her masochistic slut-training, so I humbly place myself in your hands."

And thus, I was thrown into a "what on earth am I even saying" type of situation: executing a masochistic slut-training session on my girlfriend while my biological little sister and my girlfriend's mother watched.

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