Motherfucker by rat_race

“Doing this with me doesn’t make you gay, or bisexual, or weird. And it doesn’t change the way that we feel about each other, except to bring us even closer together than we were before.

“However, what it does do is prove that you’re human. Just like I am. And we both naturally like to have our genitals stimulated. And there’s absolutely nothing wrong with that, is there?”

“No, ma’am,” Lacey agreed.

“Good. Now get your fingers out of my pussy! And I’m going to go sit over there in that chair and diddle myself, while I’m watching you two kids trying to make a baby together.”

Meanwhile, I was standing there beside the bed in total shock. I couldn’t believe the impromptu, incestuous bisexual encounter that I had just witnessed taking place in front of my own eyes.

I was also feeling pretty damn embarrassed too, and I didn’t know why I felt embarrassed like that. I mean, I wasn’t one of the participants. I was just a passive observer.

“What’s the matter, son?” Mom looked up at me as she was getting up out of bed, and asked, “Haven’t you ever seen two women having sex in any of those online porn videos you watch?”

“Yeah, sure,” I said.

“Well, take off your fucking clothes and let’s get down to business!” Mom said authoritatively, in that familiar voice that I knew meant ‘no messing around.’

When Mom sat down in the chair, my little sister quickly moved over to sit on the foot of the bed, facing my mother, while I was pulling down my PJ bottoms and my boxer brief underwear, and stepping out of them. Lacey kept staring at Mom, instead of looking at my naked body.

Then Mom said to Lacey, “I want you to tell your big brother what you want him to do to you tonight.”

And Lacey turned towards me, and while looking down at the bedroom floor the whole time, she said to me in a very even tone-of-voice, “I want you fuck me and get me pregnant, if you can. Did Mom tell you that I’m ovulating right now, and that I’m not using any birth control?”

“Yes, she did,” I replied, thinking about how long it must have taken Lacey to write and then memorize that little speech to me. Because it sounded completely rehearsed.

Then I realized when Lacey spoke up again that she wasn’t quite done with her little memorized speech yet.

Lacey said, “Good. I want you to know the whole truth, going into this deal. Don’t worry. My husband will never know that you got me pregnant. Nor will anyone else, except for the three people who are in this bedroom right now. I promise you.”

“Are you sure you want me to do this?” I asked Lacey.

And Lacey finally looked up at me with a confused look on her face. I guess she ultimately ran out of memorized stuff to say to me. And now she was being forced to actually talk to me in real time, and treat me like a fellow human being. But she still didn’t look at my face.

Instead, Lacey stared at my erect dick and my balls as she told me, “Yes. I’ve never been more sure of anything in my life. While you’re here at Mom’s house I want you to fuck me anytime you get horny and feel like it. Just let me know, and I’ll be more than happy to let you get your rocks off inside my pussy.”

“Mom, how do you feel about that?” I asked, looking over towards my mother.

“I’m good with it,” my mother replied, leaning back in the chair across from the foot of the bed, with her hand down between her spread-apart thighs, rubbing away at her own bare pussy.

The next thing I knew, my little sister motioned for me to sit down on the bed beside her. And when I leaned over and started to tenderly kiss her, she abruptly stopped me and warned me, “Kissing is reserved for my husband. I’m not here for you to show me any affection. I just want you to have pure, raw sex with me.

“Now, if you want to feel out my tits, that’s just fine. Or if you want to play with my pussy, that’s fine too. And if you want me to give you a handjob or a blowjob, just let me know, ‘cuz that’s fine too. Whatever turns you on to get you hard. But–”

“–If you haven’t noticed, sis, I’m already hard,” I interrupted, pointing downward towards my stiff flagpole of a dick.

“Please let me finish laying down the ground rules. What I was trying to tell you before you so rudely interrupted me is: Let’s not pretend that this is about love making, Carl. Because it’s not. It’s about you doing your best to try to get me pregnant. So that means you’ve gotta cum deep inside me and give me your whole wad of sperm anytime that I let you fuck me.”

I couldn’t believe that I had just been read the riot act by my little sister, and that she was still wearing her pink baby doll nightie. But she was obviously very uncomfortable being next to my naked body, because she had her legs closed up tightly, thigh-against-thigh, and she kept her eyes closed.

“Spread your legs, sis. Then I want you to pull your pussy crack wide-open and show me what you’ve got down there,” I ordered her.

And Lacey followed my instructions to the letter, without ever opening her eyes.

I knelt down on the floor in front of her, between her spread-apart thighs, and began feeling out her cute little pussy, as I was making an up-close visual examination of every inch of it, at the same time.

I had my nose so close to her little pussy that I could smell her sexy pussy-odor wafting up into my nasal passages.

“You know, Tim’s a lucky man to have a wife with such an awesome-looking pussy between her legs.”

“Please don’t talk about my husband. Okay?” said my sister.

“Okay, okay. I want you to take off your nightie, and show me your tits. I want to see what they really look like, without any material hanging down in front of them.”

Lacey grabbed the bottom part of her sheer nightie with both arms–once again, while still leaving her eyes closed–and she lifted her nightie up over the top of her head, tossing it onto the floor by the foot of the bed afterwards.

Then she dropped her arms back down to her sides and said, “Tah Dah! Is this what you wanted to see?”

“Oh hell yes! God, your little titties are so sexy-looking! It makes me just want to rub my dick against them. Can I?”

“If that’s what you want to do, go right ahead,” the closed-eyed Lacey said to me.

I stood up in front of her, making sure to place the head of my penis right under her nose for a few moments, so that she could get a good whiff of my “manly aroma,” before moving my dick down to her right breast, and teasingly rubbing the tip of my dick from side-to-side against her nipple.

Then I moved my dick over to the other side of her chest, and did the same thing to her left nipple.

And Lacey didn’t react at all to anything I was doing. She didn’t open her eyes, or move around, or do anything else, other than to just sit there on the foot of the bed, acting more like a living statue than a human being.

I couldn’t believe how cold Lacey was being towards me, when just moments before she was so warm and loving towards our mother, when they were both in bed together, doing the “bisexual shuffle,” as it were.

But now that she was with me, it seemed like she was just enduring it all, patiently waiting on me to tell her what I wanted her to do next.

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