A Little More Everything

Melanie's face heated up. "J-john!" she squeaked. "I didn't see you there!"

"Well, I'm glad I saw you," he muttered into her hair, as it changed with a snap to a light minty green. "I've got something I wanted to tell you. Can we talk in my room?"

"S-sure," she stammered as she let herself be led away, not noticing that her boobs had grown into plump F cups. He steered her down the hallway, letting her grow a few inches with another snap of his fingers, until she was the same height as he was.

He closed the door behind her.

"Now, I've been thinking-" another snap, and the number of her breasts doubled, four large mammaries almost bursting out of her cardigan. "-that maybe I haven't been the best brother-" snap, and her butt extended back into another set of legs, another four breasts hanging down between the torso that separated the two. "-because I know about your secret-" six extra arms burst through her shirt, tearing it to shreds and folding over her magnificent chest as she looked at him sourly. "-and I can't say I approve."

Melanie scowled at him. "What secret?"

He clicked his fingers. Her humantaur body began to bulk up with **** amounts of muscle, growing in hight, width and impossibly in strength. Soon, she towered over him, glaring down at him from a huge seven metre height. He **** his face to become sombre. "I know you masturbate to me every night."

Another click doubled her libido, one more snap to triple her aggression. Her eyes almost flared with fire as a growl built in her throat.

"And you don't approve? You don't think I should have the right?" Her muscles flexed as she grew bigger and bigger. "Do you not want me? Do you think I am not worthy for you?"

John backed up against the wall as his sister came closer and closer, her skin glowing with heat, her muscles coiled and ready to pounce. "Well, 'big brother'," Melanie sneered. "I don't give a fuck what you think."