Rouge would make for a good start. After all, the woman was practically already a bimbo to begin with. Plus, the idea of having her under her control was just too enticing to pass up...
---
Rouge landed gracefully at the foot of the apartment complex where Amy lived. She didn't know why Amy had invited her over. They were friends, sure, but they didn't exactly hang out on the regular. She was pretty surprised to be invited to her place, let alone on the vague premise of "showing something cool," but her curiosity got the better of her. Reaching her floor and rounding the corner, Rouge's eyes caught sight of something shining in front of Amy's door. She checked to make sure no one was watching and then, carefully, slid over to the bright pink emerald on Amy's doorstep.
"Sorry, Rose," Rouge smirked, "But you ought to know better than to leave this out around me..."
She picked up the emerald, only for it to explode into a flash of light, showering her with sparkles.
Ah, it'd been a stupid prank. And she'd fallen for it. Rouge was just about to turn heel and stomp away, when she felt her mind begin to... Drift...
Amy's door slid open, and Rouge wordlessly wandered inside, head swimming.
"What's... Happening..." Rouge muttered, trying and failing to collect her scattered thoughts. Just then, a woman of even greater sex appeal than she appeared in front of her. Rouge's eyes widened, recognizing the figure as Amy!
"Amy???" Rouge exclaimed, or at least tried to in her subdued state. Amy smiled.
"Congratulations." She began, "You're going to be the first to join my army..."
"Army?" Rouge questioned, before crying out as her whole body was hit by a sudden feeling of intense pressure. Her breasts exploded outward, going from D-cups to DDs, all the while her rear expanded to match. Rouge wanted to resist, but the feeling of growing was too incredible for her to even think of trying. She fell to her knees, eyes glazing over as they turned pink.
"Yes... My queen..." Rouge muttered, mind easily overtaken.
Amy smiled, only to recoil as new power flowed into her. Her outfit strained as her heaving breasts grew even larger, while her shorts threatened to split from her rear. Her legs became more toned, feeling more and more powerful. She felt her canines lengthen into sharp fangs. And from her back, a pair of wings sprouted. It seemed that not only would she grow sexier with every new person converted, but she would also obtain a copy of their powers. This explosion of new feelings filled Amy with lust, pulling Rouge into a rigorous make-out session to blow off some steam, only pulling herself away when one of her breasts popped out of her shirt.
"Ugh, so annoying." She sighed, before taking another look at Rouge. "Maybe you're onto something with the jumpsuit..."
No sooner had Amy said this that her outfit glowed, morphing into a copy of Rouge's jumpsuit. Finally satisfied, she turned back to her subordinate.
"Listen carefully, Rouge, this is the next step of my plans..."
What will she do?