Chapter 24

After casually quizzing her to see if the suggestion had stuck, it had been a bit of effort to kick Marcie out.

After she’d swallowed my seed down, she’d wanted me to fuck her. I claimed to be out of condoms, ignored her (admittedly tempting) offer to go bareback in her ass, and sprinted up the stairs to Lucy’s room.

“Lucy!” I called through the door, but there was no answer. I opened the door, but she wasn’t home.

Unbelievable. I finally crack the code that lets me turn my sister into my own personal sex slave, and she’s not around to be turned.

After a few minutes of hunting, I found Mom in the back yard, hanging out the laundry.

“Hey kiddo,” she said, and I paused briefly to admire the silk robe she’d inexplicably decided to put on as soon as she got home. As usual, she didn’t even register my lustful gaze.

“You seen Lucy?”

“She’s out tonight, remember? She’s seeing the hip-hop.”

I couldn’t help but laugh at that - Mom actually does a half-decent job of keeping up with the music Lucy and I like, but no matter who’s playing, she always calls it “the hip-hop”. She smiled at my reaction, and as she turned back to the pile of washing, her robe slipped slightly, revealing one of her thick brown nipples.

I was immediately hard as a rock.

“I’ll, uh, I’ll talk to you later.”

“See ya,” Mom said casually, and I sprinted to the front of the house. With Lucy out all night, I wasn’t going to be able to try anything there, and - despite my best efforts - I was no closer to getting one of Mom’s incredible nipples in my mouth than I had been when we started.

And that just left Marcie. If I ran, I might be able to catch her before she left.

Session 32:

“Okay, hypothetical: you live in a world where incest between brothers and sisters isn’t weird.”

Nod.

“It’s also normal for sisters to be their brother’s sex slaves.”

Nod. Jesus, Lucy. I was tempted to wake her up right then and there, screw the consequences.

I didn’t, of course. I was pretty sure everything was going to be fine with Marcie, but I wanted to be sure before I took any chances. And so in the meantime I was just practicing the perfect scenario, the exact hypothetical that I’d give her before waking her up ... and changing our lives forever.

“Mom’s upbringing means that she thinks it’s strange, so it’s something that needs to be kept secret from her...”

Nod.

“ ... but you secretly wish that she was included as well.”

Nod.

“You want your mother to be your brother’s sex slave.”

Nod.

“Say it.”

“I want my mother to be my brother’s sex slave.”

Session B50:

“Marcie? Marcie, can you hear me?”

I hadn’t managed to catch her driving away, but I was so worked up that I’d decided it was worth the hike over to Marcie’s house. Sure, I could have waited for Lucy to get home, but I had a willing fucktoy waiting ... no, begging for me to take her.

And it wasn’t like when Lucy and I finally did the nasty, I was going to have trouble getting it up.

Half an hour later I was out the front of Marcie’s place. Her car was out the front but no one answered the door. Figuring she might not have heard the doorbell, so I popped around the back, grabbed the spare key, and within ninety seconds I was up the stairs and in Marcie’s room.

That’s where I’d found her, tears running down her face, staring at the computer in front of her, looking like she was struggling to breathe. My heart leapt to my throat as I called out, but she completely ignored the sound of my voice ... until I began putting her under.

Within a minute, the tears had stopped, and she was staring straight ahead, that familiar blank look on her face.

“Marcie?”

She didn’t answer.

Session A65:

“Okay Mom: hypothetical.”

Almost everything was ready. I was only a few sessions away from testing the “sex with a brother and sister was normal” scenario with Marcie, Lucy was all set to become the sex slave I’d been fantasizing she’d be for so, so long...

It was all going to plan. Except, of course, for my mother.

“Lucy’s door is closed.”

Nod.

Only hooking up with my sister while my mother wasn’t around ... well, I mean, obviously that sounded amazing, but I didn’t want to stop there. I wanted constant, unfettered access to my sister’s body.

“You need to talk to her.”

Nod.

“What do you do?”

“I ... I wait until a better time.”

I smiled.

“Why?”

“Because I don’t want to interrupt.”

Great.

Session B50:

“Marcie, can you hear me?”

No response.

“Marcie ... would you tell me what’s wrong?”

That had worked with Mom, but Marcie didn’t even acknowledge that I’d said anything.

Fuck. Fuck. What the fuck had happened?

I tried asking Marcie a few more questions, but she didn’t say anything. And that’s when I thought to look at her laptop.

She was on a reddit thread - /r/sex, it looked like. A guy was asking about a potential threesome with a brother/sister pair, and the comments...

Oh, shit.

The comments weren’t positive.

“sorry but it’s just wrong”, one redditor helpfully offered.

“that’s sick,” someone else said, followed by a winky face.

“I wouldn’t do it, but each to their own,” was the third-highest voted comment ... and as I kept reading, I realized that it was by far the most positive.

Oh, shit.

My mind was racing, trying to work out how I could undo the damage when I realized that wasn’t the only tab Marcie had open. “Brother-sister threesome”, “Sex with siblings”, “fucking my best friend’s sister” - they kept on coming. A mix of porn, Yahoo Answers, reddit threads, an incest-based Tumblr...

Oh fuck.

What had I done?

Session A65:

Once Lucy was under my complete control, she wasn’t going to notice anything odd if Mom started wearing less around the house.

Not, of course, that there was much less that Mom could be wearing. Unless...

I grinned broadly as I began setting up a new scenario.

“Hypothetical: You’re eight.”

Nod.

“One of your friends comes home from vacation, and she has a secret to tell you.”

Nod.

“Her family went to a nudist colony over the summer.”