120 Nights of Pony

I slowly feel my mind lifting itself out of the best damn sleep I've ever had. Let's see, green hooves--check. Flappy bits--check. I find a mirror on my new dresser, and confirm the blue eyes and a dashingly scruffy mane. Lifting a couple legs confirms that I have not been swindled out of my man bits. If anything, I'm hung like...wait for it...

"Hey, bro!" The sister--Rushing Winds, that's her name--interrupts my really amazing joke. Darn sisters, always interrupting your best jokes. I can't stay mad at her, though. Not with the way she looks at me. "It's about time you got up," she says. "We got the whole day to do whatever we want, right? Gotta make the most of it!"
She turns around, her tail flicking back and forth as she starts walking out of my bedroom.

Obviously, I walk right up next to her, unfold a wing, and give that ass a good ol' SMACK.

"yEEP"

She flies four feet straight up.

klunk

Dust falls off the rafters. Oops. As she comes back down, mumbling under her breath, I notice with quiet approval that she is blushing like mad.
"What the heck, Dawny? You can't just--"

"Smack my sister's butt?"

"It's--"

"Wrong?"

"I'm your--"

"Cute twin sister?"

"And--"

"Nopony would approve even though you know both of us want it and nobody's gonna know what we do in our own apartment?"

She sputters for a little bit longer before pouting angrily at me.

"What? You know I'm right."

"Doesn't mean you're right. Stupid mean sexy brother."

I roll my eyes and grin. "Listen, sis. We could go to the park, visit the mall, do whatever else we were gonna do--"

"super mareio kart"

"Yeah, that. Or we could fuck like wild animals, and have an experience that nobody else can have. Plus you have a really good butt. Like damn."

"...you sound...different," she says, tilting her head and narrowing her eyes at me.

"Uh...sudden burst of confidence?"

"...Eh, I can buy it. Where you wanna boink?" she says, and I have to stifle a giggle. "On the bed? On the couch in the living room? On my bed?"

"Right here?"

"Right here." She practically tackles me, and we roll head over hooves for a couple feet--do they use feet in horseland? I land on my back, with her body pressed against mine--her face is less than an inch from my face, I could lean up there and kiss her. Or she could lean down and kiss me, which she does--her lips gently parting to let a moan slip through, as I run a hoof over her rump. It occurs to me that my insistent refusal to jerk it to ponies was a mistake.

"Dawn..." She bats her eyes at me. I swear to God, she was practicing for this. "Big bro. Do me. Right now."

I bust out laughing.

"What--Dawny~! It's not funny--"

"You're adorable," I whisper, and she freezes mid-yell. I grab her hips, and then--

Then it's on, and I can't tell if it's her riding me or me pounding her--

I'm going from tip to hilt with each thrust, her body like fire next to mine, her tongue dancing around my teeth--

She fits me like a fucking glove, and all of you can go fuck yourselves, twins really are made for each other--

"Dawn, I dunno how long I can--" She moans, and her body clamps down around me. I'm kinda surprised she lasted this long, given how fast we're going. Hell, I don't know how I'm keeping up. Speaking of--

"Where you want it, sis? I'm gonna--"

"INSIDE!" she screams, and I tug on her hips, and for a good two or three whole seconds I ride it out. It's the best orgasm I've ever had, and I'm pretty sure this is just the start. When my eyes start working again, I feel my heart skip a beat--her back arches, and her head tosses, and the way her mane flows through the air as she moans out my name...well, her brother's name. Fuck you, it was beautiful. You're just jealous you didn't get to participate.

She slumps forward, curling up on my chest as I wrap my wings around her. She's leaking a bit, but that's okay.

"Good?" I stammer out between desperate gasps for breath.

"Perfect," she says softly, and her eyes shine up into mine.

"I wouldn't say 'perfect'. What time is it?"

"I dunno, like eight o'clock?"

"We got the whole day to do whatever we want, sis." I wink.

"...let's make the most of it," she purrs, slowly dragging herself off my cock. Oh, this was so worth it.