csofthedmc: Hmmm...I might be convinced to do some sexy pregnancy and some mild mutation sometime, if anthro ponies were involved. :p
* Echoen giggles. "Does the mere mention of Octavia send you into an orgasm?"
* csofthedmc chuckles. "Not so much Octavia, really. :p I'm much more a Fluttershy mousie. Or Rainbow Dash. But I imagine a naughty, bouncy, mischevious Pinkie Pie would be the cause of it all~"
csofthedmc: I could imagine Pinkie giggling as she sprouts an extra set of arms and ballooning tits, which is a good thing since she needs 4 large pony hands to stroke that massive party cannon shi's growing. :p
Echoen: :D
Echoen: That's my kind of party!
csofthedmc: Pinkie could make a special party potion that makes mousie's cum a super-mutative type of spooge...and makes it easy to make mousie blow his nuts~
Echoen: "Mice is nice when taken twice!" 
csofthedmc: Pinkie takes the first splash, and suddenly there's double the heads! And then she grabs and aims that dick, pumping it til Applejack turns into a big, buff, hermy taur~
Echoen: Applejack's ass is so nice~
csofthedmc: Hehe...maybe Applejack just grows...getting thicker, curvier...that ass and those tits swelling out til there's 9 feet of curvier, hermy farmpony~
csofthedmc: And then Rarity gets splashed, and suddenly she's moaning and luxuriating in the need to have her three pairs of swollen tits milked~
Echoen: Mmmph, you're a gooooooooood mousie
csofthedmc: Pinkie gets impatient and that gluttenous pony starts licking at the fat head with both heads, pumping and stroking that shaft til another blast gives her an extra set of arms and tits...those chest-balloons swelling really huge and full of hot Pinkie milk as well~
Echoen: I wish you would write a story about this~
csofthedmc: And then can't forget Fluttershy, hosing down the sexy naturepony as she feels herself growing like applejack, but bigger...shredding her sweateras those huge, swollen milk-puppies slosh and wobble with their load...and so do Fluttershy's new nuts, both pairs to be exact~ with two throbbing, spotted equine dicks drooling heavily~
csofthedmc: And then of course over to Twiliht, where it would react the most strongly! She'd end up tauring out, with two huge, fat pairs of nuts, each testicle swollen as big as a watermelon with twin erect cocks throbbing underneath hir...huge enough for the flared heads to poke out from between hir forelegs, as 3 pairs of arms are trying to hold onto three pairs of tits that are swelling and leaking profusely in hir hands, those twin heads moaning excitedly all the while~
csofthedmc: *Twilight
Echoen: Seems like you have so much energy!
csofthedmc: Some. X3;
* Echoen giggles. "Want to start a scene? With ponies."
csofthedmc: Mmhhh, sure. I think I could manage an hour or soooo~
* csofthedmc smiles as he walks up to the door of the pink party pony's place and knocks. He'd gotten an invitation to what was only announced as a "Very Special Party", his mousie tail flicking behind him in anticipation~
Echoen: Pinke Pie was as energetic as ever - she'd only needed ten seconds to spruce up the place with her party cannon! The Cakes were out with their kids, so she had the whole shop to herself! Her big tits bouncing in her party dress, she opened the door with a bound. "Hieee!" She SQUEEZED you in her arms, smooshing you against her massive boobs, soft tummy and curvy thighs. "Are you ready for your birthday bash?"
* csofthedmc myeeps as he's suddenly picked up by that big, smooshy, sexy, (maybe slightly crazy) party pony, and grins. "Mmhhf, s-sure am!" He has to mentally try to keep himself calm against that big, sexy body. More than once had her huge gone from straight from the door straight to the party girl's bedroom! And boy did she know how to treat an oversized mousie dick~
* Echoen is well accustomed to how big and spunky a mousie can get! She's always able to explain away the mess and the huge tummy she often sports after, as cake batter and too many cakes. Her fat nipples brush against your chest as she sets you down, her pink hooeves clopping along the floor. "It's not really a surprise birthday party since I invited you here and that would ruin any surprise but I got another surprise to surprise you with, so, surprise!' She pulls out a bottle of some greenish looking goo. "I got it from Zecora when I said I wanted to surprise a special somepony who's not a pony but woh's lots bigger than one of Fluttershy's critters but isn't Spike and certainly isn't a big mean ol scary dragon!" She downs half the bottle without even taking a breath.
csofthedmc: [Do you mind her having feet, or do you insist on hooves? I'd always figure the anthro ponies would jsut have large feet instead of hooves. XP]
Echoen: (Go ahead!)
* csofthedmc watches that thick rump, curvy form, and of course those large feet wander off to go get his surprise as his ears perk in curiosity. His eyes widen as he sees Pinkie down half of the green liquid in that bottle, tail flicking a little faster. "Pinkie..uh...are you sure that's..." He doesn't quite finish the sentance. Even if it was unsafe, he can't imagine it'd have any ill effect on someone like -Pinkie- anyway!
* Echoen almost always walks around barefoot, but sometimes sandles or other flimsy flopsy footware - almost all of them having a special indentation shaped just like a little tiny you. She hands you the bottle with a giggle, her tits jiggling in your face, nipples tenting out against her clothes. "Whoo that works fast! Y'know, I really should bake Zecore s-s-s-s-ooommmmmeeethiiiing!" She says, shaking vibrantly like she's having an earthquake. Her clothes stretch and pop around her swelling figure, two new arms tearing free of her sides, immediately cupping over the extra pair of huge boobs balloooning on her chest. "Balloons! I love balloons!" Her hips thicken and fill out heavy and so fertile, and she shakes her bum and tail at you, showing off her wet mound. "Drink yours too!"
* csofthedmc gulps as his pants are already beginning to fill out with dick just at the sight of Pinkie's new form, nibbling on his bottom lip. Those small mousie hands take the potion, downing it with a gulp as he gives an eager little squeek up at her. Within seconds he can feel it starting to shift him, feeling himself also sprouting another pair of arms...and suddenly his pants start to pop and tair as he myeeps, realising that he's slightly lost control of his compression all of a sudden, those nuts balooning in those pants til they SHRED, huge, fat, -sloshy- nut swelling out and churning with cum, as big as basketballs. Both of mousie's heads seem to be arroused by this as that throbbing prick twitches in anticipation.
csofthedmc: [Had an idea that Pinkie helps mousie cum inside of and impregnate several of her friends, mousie losing a foot of height with each orgasm, ending with mousie nice and mouse-sized for Fluttershy to take care of. With her toes.<3]
csofthedmc: [Of course, the potion makes mousie's jizz mutate her friends as well~]
Echoen: "Just what this paaaarty needs! More balloons!" Her big soft hands, all four of them, slide and grope over your huge nuts, massaging them, pressing her four fat tits right up against them, swallowing over your cock as well. She giggles and nuzzles between your two muzzles, and she kisses one - then both - as she finishes up her initial changes into a two-headed ponyslut. "Bet you want to open your present now." "Before the other ponies get here to give you theirs!" She stands up and leans back against a wall, two hands spreading her maresex, another two groping her breasts.

csofthedmc: Smoosh! Squish! Those large pony hands have soooo much hot nutflesh to grope and squish as the mousie(s?) whimpers and bucks lightly against her mouth. Her touch feels good, REALLY good all of a sudden. That dick surges heatedly against Pinkie's smooshy tummy as her two heads kiss at his own, and then as she presents herself for the mouse. He grinds that shaft against her smooshy tummy a few seconds before drawing that big dick down, pressing the tip to her entrance, and then shoving alll of that cock deep into the party pony's stretchy, very accomodating depths...while the party pony gets to feel oh-so-full, like she loves! Good thing she's first, instead of last~
* Echoen has just the right amount of softness and pudge, for a superactive pony who gobbles up cakes and pies and muffins all day! Probably a bit more, since she's soooo fertile now, her maresex dripping heatedly with girljuices. She moans in stereo as your huge shaft pushes up deeply within her cunt. "Big... bouncy... birthday... boy!" She starts riding up and down your shaft, slicking her cunt over your huge shaft, clenching it within her. Suddenly, the door bursts in. "Alright! Who's the birthday boy!" It's Rainbow Dash! She flies in and hovers above the floor. "Hehe! Looks like somepony's opening their gift early!" As the pink pony squeals at the cuntstuffing. the blue-rainbow pony snickers and sets down nearby, nuzzling at your balls. Soon there's a deep slurping as hot pony tongue slurps across your sex... and soon, there's a thud of heavy dark Rainbowdash cock slapping her belly, flexing fatly in its growth.
* csofthedmc holds ono those curvy hips as he shoves up into that extra-fertile cunt, pushing, pumping that mousie dick deep into her puss, the perfect size for a sexy Pinkie Pie! One head nuzzles against her soft form, while the other is lifted up, eyes lidded and panting . Suddenly both heads turn to look at that sexy trainbow pegasus entering with that dark equine shaft hanging out...and swelling as the hermpony gets down and starts slurping at that hot mousie cunt. Pinkie sohuld probably warn her to go ahead and get that equine shaft in and blowing early, before it becomes trickier to do so...
Echoen: "R-r-rainbowdash! You're early..." One head moans, then is lost in the pleasure of the cuntstuffing. The other chimes in. "Better give him his g-gift before he-e's too busy to take it!" With a snicker, Rainbow Dash stands up on her hind hooves, slurping across her face with her big tongue, cleaning up your juices. She trots forward and firmly STUFFS her huge cock into your sex, stretching you open and thick around her heavy equine shaft. Her pert D-cup breasts snuggle to the back of your heads, but as she fucks you, you can feel them pumping bigger. Her blue hands cup your chest and grope your hips, four of them now, and four pegasus wings too. Her thrusting drives you deeper into Pinkie Pie, and the two ponies start making out, both with two heads.