Abi, a medium height skinny woman with a light build and platinum blonde hair, stood in a large open room.Annabelle, a 6" plus giantess with a well built and curvy body, lay strapped to a table. She smiled happily, waiting for the transfer process to begin and she would finally take Annabelle's slime.
Annabelle was the luckiest of the siblings, she was powerful and attractive, with lots of warm green Slime packed into her jeans, and so many under her control. Now it was Abi's turn for power, she would steal Annabelle's Slime and take her place once and for all.
She slowly came to, lifting her head up slightly to see Abi at the top of the stairs ahead of her, at first she was confused, but she soon realised what was happening as she began to pull at the very tight restraints holding her down.
"Abi... W-What're, What're you doing!? L-Let me go! Abi! Please you're making a big mistake!" yelled Annabelle, staring at her sister angrily, she yanked at the restraints, desperately trying to work her way free as she attempted to pull her hand through, close to breaking her wrists if she pulled any harder.
Abi laughed, flicking her hair aside "Ha, no way Sis. You've always gloated at how strong you were, always reminding me how weak and worthless I was every chance you got! And since you went to the trouble of restricting my ability to feed on others, so I couldn't compete with you... I thought, why feed on others, when I can just take your power instead? We're related by blood, so all your slime should be compatible with me too..." giggled Abi, walking past her sister with defiant composure.
"Then once I'm strong enough, I can overcome your changes you made to me... And feed freely." She added, heading towards a staircase just out of Annabelle's view.
"Abi come on please, don't do this! I've worked too fucking hard gaining all this.... Abi, please don't!" said Annabelle getting more and more worried, she tugged harder at the restraints. A sense of danger and panic grew within her rapidly, she knew Abi wouldn't back down now, there was a very slim chance she would get free in time to stop her jealous sister.
Abi stopped at the top of the staircase, reaching over to a control panel and entering the final commands into the console. Abi strolled back down the stairs towards her sister, who squirmed and struggled, trying to break free.
A strange orb levitated above Annabelle, she thrashed at the restraints, desperately trying to free herself. Abi laughed as the orb lit up, emitting a blinding bright blue light, Annabelle was now totally unable to move, the light seemed to possess her body, forcing her to stare directly into the light, she screamed loudly.
A few seconds later, two tubes lowered from either side of the orb, Abi strolled down the stairs to grab the tubes, once in her hands she proceeded to insert them up Annabelle's trouser legs, feeling the resistance of her sister's Slime as she inserted them, gradually easing them in. Once in up to her knees, it would be enough so all her Slime could easily be drained.
"Abi! Please, No! Don't do this!" Cried Annabelle, tears rolling down the sides of her face. Abi smirked, heading back up the stairs, greeted by two more tubes, she took each one and side them down either side if her hips into her jeans and knickers ready to receive her sister's Slime.
Abi shuddered with excitement for a moment before she pushed one final button on the control panel nearby and the transfer began. Annabelle screamed and begged, pleading Abi to stop as she heard the tubes rattling, starting to suck and slurp, gurgling as it drew her Slime into the tubes.
Within seconds the tubes on Abi's end started to splurge and splutter as warm sticky green Slime bursted from them into her knickers, they began to bulge heavily as the Slime spread around to her front and back. Then gradually spilling through the edges of her knickers and down into her empty welcoming jeans.
Abi gasped blissfully "Ahh, Oooh... Y-Yes!" tensing up with excitement as she felt the Slime ooze through her knickers and into her jeans, the texture of such soft sticky gunge against her skin made her extremely horny, her cunt starting to feel a bit wet as she gazed down at her growing hips. The Slime bubbled and squelched as it oozed down her legs.
After a few moments, as her arse began grew bigger, pushing at the material of her tightening jeans, she felt an increasing sense of strength and energy, her body begin reinvigorated and replenished as Annabelle's Slime finally started to bind to Abi, giving her control of it and all those Annabelle had infected with it.
Her physical appearance changed slightly as her body's health and efficiency was replenished, transforming into a perfected version of herself. Her platinum blonde hair became thicker and fuller as stole Annabelle's life force.
As her body changed she felt her bust get slightly larger and firmer, watching as her sister's boobs got smaller. Her very structure became slightly more muscular, Abi felt stronger, tougher and far more powerful as her supernatural abilities increased tenfold.
Annabelle screamed, begging Abi to stop before it was too late, but Abi ignored her, enjoying all the power and Slime she was gaining. She closing her eyes and tilting her head back, feeling her lower proportions grow. Soon her jeans began to creak as they grew, pushing the seams to their limits, trying to contain so much Slime. Abi's hips had broadened beautifully, now firm and strong compared to her narrow figure from before.
Abi lowered her arms, gripping her swelling arse firmly and groping the two large handfuls of it, she could feel all the Slime oozing around inside, soon it would barely have enough room to move as it gradually became more tightly packed "Ooh yes!" She moaned "Just how it should have always been... So firm and tight. Hnnng!" She slurred orgasmicly. She swayed side to side gently, feeling the weight of her sister's Slime move with her body, her arse and hips felt heavenly as she moved, the Slime sliding all over her skin felt incredible.
The Slime continued pumping into her jeans, now reaching the bottom of her trousers, the pressure of holding everything inside prevented any Slime from seeping out the bottom, sealing all of what was Annabelle's Slime into Abi's jeans.