Sister's Toilet Training: A Ball-Crushing Erotica

The brother was lying on his bed, lost in the throes of pleasure. He was completely oblivious to the world around him, his mind focused solely on the task at hand.

Suddenly, the door to his room swung open, and his sister walked in. She caught him in the act, her eyes widening in shock and disgust.

"Ew, gross!" she exclaimed, covering her nose with her hand. "What are you doing, pervert?"

The brother's face turned beet red as he tried to defend himself. "I was just...uh...relaxing," he stammered.

But his sister was having none of it. She approached the bed, a mischievous glint in her eye.

"Relaxing, huh?" she said, raising an eyebrow. "More like indulging in your perverted little fantasies."

The brother tried to escape, but it was too late. His sister was already grabbing his balls, pulling them towards the toilet.

"No, wait!" he yelped, but his sister was already sitting on the lid, pressing down hard.

The brother's eyes watered as he cried out in pain. "Stop, it hurts!"

But his sister just laughed, jumping up and down on the lid. "Poor baby," she taunted. "Can't handle a little pain?"

The brother begged her to stop, but she was enjoying herself too much. She continued to taunt him, calling him a "wimp" and a "crybaby."

Finally, she released his balls, but not before giving them one final squeeze. The brother was left lying in pain, while his sister walked away, still chuckling.

As he lay there, the brother realized that he'd have to be more careful next time. He didn't want to risk another painful encounter with his sister.

But even as he thought this, a part of him couldn't help but feel a strange sense of excitement. He'd never been dominated like this before, and it was both terrifying and exhilarating.

He knew he should be angry, but instead, he found himself feeling a strange sense of admiration for his sister. She was strong, controlling, and direct - everything he'd always found attractive in a woman.

He couldn't help but wonder what it would be like to be with her, to submit to her every desire.

But for now, he knew he'd have to keep those thoughts to himself. He couldn't let his sister know how he really felt.

At least, not yet.