A few days pass

As strange and chaotic living with Rina was, the human mind was resilient and you could begin to tolerate her flirtatious teasing and nightly moans at the expense of frequent masturbation sessions.

What you didn't expect was that it could get worse.

You came home one day to the sound of giggles and conversation. Rina was in the living room, dressed like a slut as usual, chugging down a can of beer. Dad gave her a generous allowance (much more than what you received), so she was quite free to spend on anything she fancied.

You were surprised to find her with company. Another girl with shiny, dark purple hair sat on the floor. Her uniform was of a different school's. When she turned around, you simply stared in silence- she was stunningly beautiful! Her hair was cut short, and curled into a face that was like a flawless doll with mysterious eyes. You couldn't deny Rina was beautiful, but a great deal of her appeal was her killer body. This girl could make heads turn even if she was wearing a potato sack.

"Meet Airi-chan! Isn't she the cutest?"

"Hello, I'm Airi." She was distant and aloof, a world of difference from Rina's personality.

"Ah, nice to meet you. I'm Takeru."

"Airi-chan and I go wayyyy back. We're basically sisters." Rina gave her a hug. While she wasn't as well endowed as Rina, Airi's tight school blouse revealed a slim but stacked body. Watching the two girls share close skinship was simply very hot.

"Sit down, have a drink!" Rina cracked a can open and shoved it in your hands. You were feeling more nervous than usual. Rina's rambunctious nature did make it easier to talk to her.

"So as I was saying, Airi-chan, I was jerking his cock when my husband came in! It was super hilarious!"

You spat your beer out in a coughing fit. How could she just blurt that out? Even now, Rina was rudely laughing at your reaction.

"Rina!"

"What?"

"D-don't bring that up!"

"I tell Airi-chan everything! So, the next night, when we were having dinner..." Rina ignored your protests and continued to tell all the shenanigans that happened over the next few days in explicit detail, even including her sex life with your dad. It was awkward, but truthfully you wanted to stay and ogle at Airi. After a few cans of beer, you could tune Rina's taunts out and even joined in some of the banter. Airi remained mostly silent.

"I need the loo, be back!" Rina announced and bounced away. Silence fell upon the living room.

"Is it hard keeping up with the girl?" Airi shook her head at your question.

"No. I love Rina. She makes life much more fun. No one else wanted to be my friend."

"Is that so..." You felt like you were touching a nerve. Airi's hand reached out and patted your head softly. "But I understand what you're saying. Rina does not think before doing. Please don't think she has any malice."

"She is a bit too much sometimes. She's married to my dad and yet..."

"Do you want to sleep with her?"

You were taken aback by her direct question. Perhaps some of Rina had rubbed off on her.

"I mean... yeah. She's really hot." You chuckled. "Like really, really fucking hot. But she's my stepmom. It's complicated." The **** was making your lips loose. Airi nodded in silent agreement.

"But it's hard with her teasing. Do you need help?"

"Help? If you could sto-"

"No, I mean, you could... sleep with me instead." Did you hear that right? Did Airi actually just say that? Now that you looked closely, she did seem more flushed than earlier, and there was a moment's hesitation to her words. "I'm just really curious as well. Rina keeps talking about it, but I'm still a virgin. And she said you're one too. It feels less scary."

"Uh... um..." You weren't dreaming, right?