Incest Thread-Sex Ed (Piecest) by Frostybox

>Pinkie Pie is your sister
>You grew up on a rock farm and moved away (sup frosty)
>Your sisters are seriously sexually repressed when you go back to visit
>Pure lust and curiosity (mixed in with sex education that was shoddy at best) leads to Pinkie sucking on your testicles the first chance she gets


>"So then the penis..." Maud begins
"yeees?"
>"The vagina goes into the penis-"
>You sigh out of frustration
"No! Goddamn it Maud, how would that even work?!"
>She blinks once, "Perhaps with enough lube. Just like-"
>Oh god, no. Not again
>"Just like for anal!" you hear all your sisters join Maud in cheering
>Face, please allow hand to pass through so you can end this torture
>...Damn you face, you bitch.
>At least they seem to have the concept of anal down-
>"Tight?"
"What?" you ask Pinkie
>"Nothing! Just breaking walls like pussies break hymens"
"Pussie- No! Pinkie I told you, the hymen is-"
>"The hymen is inside the pussy Pinkie. Don't you remember when Anon popped yours?" Limestone huffs, clearly irritated by this staggering level of incompetence on your sisters' parts
"Yes, thank you Limestone"
>She crosses her arms tighter, further enhancing the volume of her supple chest
>"Uhm... Anon?" Marble speaks up, just barely above a whisper while the room is quiet
"Yes Marble?"
>"I think I'm getting confused. So the penis goes into the vagina"
>You nod once
>"Th-then they... slam jam-"
>Thank you Pinkie for that one
"Yes, Marble..." you respond, hope building in your chest
>"A-and then the penis... it erupts with torrents of white lava-"
>"Only if it erupts outside-" Maud adds, "-It's a magma creampie if it remains inside"
>Rock metaphors were the only way to get across to her, surprisingly effective
>"Right, thanks Maud. S-so after that, the brother and sister snuggle together and h-hold hands?"
>You watch the faces of all your sisters light up with color
>You wince at her closing statement
"Close... Marble, you have to understand that all that is just about a guy and a girl. Not brother and sister specifically. It's not supposed to be done between siblings"
>Limestone lets out a low prolonged growl, "Gah! I don't get this! So you're saying everything Marble said was wrong?!" she hisses, poking you in the bare chest after having crawled over towards you on all fours


>You look your sister in the eyes with utter disbelief
"Goddamn it girls, we just went over this for the TENTH TIME! How can you all be this dense?!" you spit back at Limestone, who very clearly doesn't take it well
>Her hand trembles with anger as she slowly raises it to your neck
>"Whoa whoa! Hold on Limey" Pinkie chirps, slipping in between you and Limestone
>Which means she's planted her plump rump down onto your cock
>Pinkie leans back and presses her back against your chest
>She raises a hand and gently trails it over your cheek, caressing it softly
>"I think we just need one more refresher to have it down pat... don't you girls think so?" Pinkie asks
>Your sisters all share a glance, nod in unison to each other, turn to you and nod in unison again
>You sigh
>God your sisters are dumb

>Anon thrusts away at your quivering creamy cunt
>Limestone is attacking his lips with her own, as her own personal payback for being yelled at earlier
>Maud gently laps at Anon's testes, just like you had done to set this whole thing off
>Her hot breaths pass over your moist clit, sending the most electrariffic tingles up your body
>Marble is sucking on Anon's nipples
>Every time she bites down, he squeezes your ass real hard
>Poor girl, you're not sure if she's playing dumb or is genuinely confused
>Regardless so long as everyone keeps this up, you'll all be set for the next couple of weeks
>Your brother is so dumb