Purple Burger Pony

Fast food confirmed - Twilight stuffing burgers down her face confirmed - Feeder Spike mildly confirmed
>Every day since.
>She'd forgotten just how good this stuff was.
>Pinkie Pie is there frequently, too
>When they run into each other, Pinkie orders them both jumbo-sized shakes to wash down the piles of burgers and fries they both order
>Twilight doesn't make as much of a mess now
>Only because she's nearly reached a point where she can swallow the burgers whole
>The proprietor doesn't even charge her anything now
>Says a princess sl... er... enjoying the food so completely has really boosted business
>So she eats until she can feel her stomach stretch; inhales until it starts to hurt
>Oh Celestia it's so good
>She'd forgotten how famished she was
>She'd forgotten how famished she always was
>She doesn't ever slow down, just stops suddenly when she hits "the wall"
>Until one day Pinkie realized what was happening
"Oooooh the wall! Lotsa ponies think you gotta stop at the wall. Just lean into it, Twilight!"
>It took two very painful burgers but after the second, a wave of relief seemed to wash over her, a second wind
>She pushed through the wall
>Her plump rump jiggles and bounces with every step now
>Her bulging belly is ever taut, ever full, pushing out against her hind legs
>She has to swing her legs out to the side a little bit and waddle to move them now
>She doesn't fly anymore. Her wings can't reliably carry her
>But it doesn't matter, because it all tastes so good
>Feels so good

>She rolled out of bed and landed with a thud
>She didn't have any choice but to roll
>She couldn't sit herself up anymore
>Her legs were sore, joints achy not from the weight they lifted, but from the pressure pushing out from between them
>They were always sore. She loved the pressure.
>Her stomach swayed then stabilized, pushed up by her legs
>It was soft in the morning, before she had breakfast
>A heavy, pillowy pouch hanging low beneath her
>If she squeezed her legs together just right, she could feel the pressure against her bits
>Every morning she'd lower her hind just a little and see if she could get into a rhythm
>It got easier every day
>After a few minutes she'd be in a universe of pleasure, but the ecstasy would be capped by the furious urges it unleashed deep inside
"SPIKE"
"Yeah yeah..."
>It took days to finish off the nachos Spike had prepared for all the little fillies that first time
>The first couple of times she'd made him recreate the pile, she'd lied and said she expected another big crowd
>No crowd would show and oh well, guess she'd have to finish them all off!
>She still couldn't manage them all in a single day, not with all the burgers
>But she could finish off the leftovers in the morning now.
>Spike refused to bring them once.
>Once.
>He brought the pounds without objection now
>Fire burned in her nether regions, want grumbled from her depths
>Twilight began to devour the nachos, reheated by Spike's fire, gooey, salty, cheesy goodness
>She squeezed her legs and felt her folds pile up between them, felt her juices dripping out from behind
>Pressure around her clit, pressure between her legs, pressure very slowly building in her stomach as it began to fill, pressure from the endless torrent down her throat, buried beneath a nearly non-existent neck
>Building... building... buil...din...g...
>Light noise sweat joy glory cool wind sensation
>Twilight gasped and swallowed and gasped as she climaxed.
>Every day since.