A finished collaboration between me and user Frostguardian on Furaffinity.
Art by me.
Story by Frostguardian (http://www.furaffinity.net/user/frostguardian/)
Characters belong to Hasbro.
Rainbow dash was magically restrained by Twilight’s magic, the same magic that was controlling Pinkie Pie. The chubby Rainbow Dash, who was at the mercy of Twilight, sobbed at what was going to become of her as Twilight soothed her victim, making a delicious piece of cake float above, ready to be fed to Dash.
Fattened by Twilight, chocolate covering her lips, restrained by Twilight’s magic, and afraid to what is happening to her body with every morsel that was stuffed into her mouth, the chocolate oozed dribbling down her face. Tears rushed from Dash’s eyes as she’d never seen this side of her friend and what was becoming of her body. Twilight just lightly kissed Rainbow Dash’s cheek as her new slave Pinkie Pie brought more sweets.
Flab began to make it harder for Rainbow Dash to struggle, her limbs becoming more and more useless as she is fed more savory sweets by Twilight. Her captor seemed to be enjoying the continued growth of her special pet. She cuddled the growing Rainbow Dash, whispering in her ear, “Grow, Rainbow Dash, so you can’t fly, walk, or even move.”
A blob of her former self, sobbing of what she has become all for the pleasure of her friend Twilight, and her legs more like stumps than anything else, Rainbow Dash sniffled, chocolate smeared on her face. She was more a piglet than a pegusus. Twilight admired her handy work, but Rainbow wasn’t done growing yet. Twilight kissed her body as sensually as she could.
Nothing more than a messy blob of herself, Rainbow Dash could only sob and eat, expanding her already massive size as her captor layed on her as if she was a pillow. Kissing Rainbow’s cheek, Twilight said to her friend, “Happy birthday, Rainbow Dash.”
Rainbow Dash seemed to be moved to what looked like a basement of some sort. Pinkie, still a slave to Twilight’s desires, stuffed Rainbow with more delicious treats. While being fed to become bigger sizes, she couldn’t help but see her new roommate was none other than princess Cadence, only much bigger. Awing, the girl’s size was something that was spectacular. She was at least twice as large as Rainbow Dash.
Twilight fed the giant sobbing princess some chocolate cake. Cadence’s useless limbs struggled to stop the feeding. “Please stop, Twilight! I’m already so- umph!” said Cadance as more food was stuffed into her mouth with a kiss from Twilight, for good measure.
Rainbow wanted to scream, for she knew this was her fate, but an entire cake was fed to her by Pinkie as she kissed her blob good night.