I woke up in the dark with the smell of my twin sister's pussy in my face. It happened almost every night, the result of a double dog dare I lost a few years ago. She always had to get up and pee in the middle of the night, and it was my job to lick her clean and then keep licking until she was done with me. I've gotten to the point that I started having sex dreams around this time of night anyway, in anticipation.
(I would get my turn every morning, when I would get up and take a piss and then walk over to her side of our bed and slap my dick in her face until she started sucking it. And there was nothing sexier than my sister with her sleepy eyes and bed hair taking me in her mouth and humming our favorite song.)
Ellie was a beautiful girl. She had a tight, fit body, and put in the work to keep it that way. She had never given herself to anyone but me. I had slept around a few times when I was younger, but she was too jealous. And the truth was that nobody was better than Ellie in bed. I remember when I took her cherry. I remember all our firsts. And she knew me and could play me like a violin.
But for now, I found her pressing onto my face and chanting in our private language, the twin-speak that we invented as kids. Quietly at first, then louder than usual, probably because our mother was in the next room and Ellie had always been loud when she knew my mother could hear us fucking.
She just used the one twin-speak word for fucking when we were having sex, but the way she said it, the tone and volume and the way she slurred, told me everything I needed to know about how to please her. The word would look silly here if I wrote it, so just imagine her repeating it, commanding with it, begging with it, "faster, right there, harder, harder, oh fuck, now, now, now!"
Ellie was cumming hard on my face and soaking me. I was lapping it up, my hands on her ass now, pressing her clit into me, shaking my head from side to side, flicking her clit with my tongue as she went over the top. When she was done she just held me there between her legs for a while and I licked her clean again.
She rolled off me and we got very quiet, listening for Mom. Back when we lived at home, we could never hear her through the wall, but now that she was living in our apartment with us, we could hear everything.
When Mom moved in, Ellie left a vibrator inside the guest bedside table drawer. Tonight was only the second time we heard Mom turn it on. Like last time we both got very excited and giggled when we heard it buzz. Then as the sound changed as she placed it inside her pussy and she began to moan, I started stroking my dick to Mom's moans.
Ellie said, "Look at you! Stroking your dick like you're fucking Mom! You want to fuck her, don't you!"
I said, "You know I do." She teased me all the time about it.
Ellie said, "Well, I'm tired of you whining about it, you little Motherfucker, I double dog dare you to be a man and do it."
"You do not!"
"Yes I do! She rolled over and took my hand off my dick and grabbed it herself as she laughed and made it official, "I double dog dare you to fuck Mom by midnight tomorrow night!"
"That's just over 24 hours! Are you nuts?"
She laughed and grabbed my balls with her other hand. "No, your nuts! You know you want to. And it's a double dog dare."
We never backed down from double dog dares. And it was hard to talk her out of it while she was squeezing my dick and balls and Mom was moaning in the next room. So I started negotiating, "What will I get when I win?"
She thought a few seconds, then said, "You can fuck my ass."
Wow. I had fucked her in the ass before, but only on very rare occasions. And she knew I loved it, and used the promise of it to control me. This was a big offer. Which really made me suspicious.
"And what do you get if I lose?"
She slipped her middle finger down below my ball sack and I flinched as she touched my asshole, "I get to peg you."
Holy shit. I had never let her do that.
"You don't have a strap-on..." I gave a weak excuse and regretted it immediately.
She pushed the tip of her finger right up into my ass and said, "I'll bring you with me to pick it out."
I didn't know what to say. Then Mom started cumming. And Ellie slipped her finger all the way in my ass and grabbed my dick with her other hand.
I was squirting all over my belly and her hand when I said yes.
---
Now what? I only had a few hours, and I needed to move fast. I didn't want to wait until morning to get started. Ellie was licking my cum off her hand when I reached over and kissed her. She giggled and smeared some on my nose, which gave me an idea. I reached down to my belly and wiped some on my cheek.
"I better get started," I said as I got out of bed.
I went to Mom's door and knocked, "Mom, are you alright?"
I didn't wait for an answer, I just barged in, and there was enough ambient light for her to see that I was completely naked.
She was in the shadows, but I could see that she had pulled the covers up to her chin, and I assumed she was naked under there too, and hiding the dildo. Her phone was on the nightstand and it was lit up like she had been using it. It made me wonder what she was watching when she masturbated.
I was disappointed that she was covered up. Mom had a very shapely body, but I had never seen her completely nude, though swimsuits and underwear gave me all the picture my imagination needed. She was tiny, and she had a long, slender neck and short red hair, small boobs and wide hips, and perfect legs.
I walked over and sat on the edge of the bed. "I heard you moaning, do you need some Ibuprofen?"
She stammered, entirely flustered and surprised, and eventually came up with, "I was just having a bad dream, I'm fine Billy, go back to bed."
"I could stay here with you until you go back to sleep, Mom." I stroked her hair while I was talking. We had always been affectionate, but I had never been this bold with her before.
"No Billy, go back to Ellie. I'll be fine."
"Ok, Mom," I said, leaning over to kiss her cheek. My nose and cheek were still sticky with my cum that was smeared there, and I made sure that some of it rubbed off on her face. I was hoping she would feel it, and smell it, and after I left the room, maybe taste it.
My dick was hard as I left, and I stood backlit in silhouette in the doorway to make sure she could see it. "Sweet dreams, Mom."
"You too...you too, Billy."
---
Back in our bedroom, Ellie was wide awake and wanted to know what happened.
"I fucked her, I win." I lied.
"Bullshit!" she laughed. "And when you do, I'm going to need proof. I had better hear pounding and screaming."
"Show me," I said, climbing on top of her and spreading her legs. My hard dick looking for a place to play.