Sister's Toilet Training: A Ball-Crushing Erotica

The brother was lying on his bed, mindlessly scrolling through his phone when he heard the door to his room creak open. He quickly shoved his phone under his pillow and tried to sit up, but it was too late. His sister stood in the doorway, a smirk on her face as she took in the sight of him lying on his bed, his hand still wrapped around his erection.

"Well, well, well," she said, sauntering into the room. "What do we have here? A pathetic loser who can't even get laid, resorting to jerking off in his own bedroom?"

The brother's face turned bright 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, her eyes glinting with mischief. "Relaxing, huh? I bet I can think of a better way for you to relax."

Before he could react, she reached down and grabbed his balls with a firm grip. He yelped in pain as she pulled them towards the toilet, causing him to scramble off the bed in an attempt to escape. But it was too late. She pressed his balls against the toilet lid, laughing at his discomfort.

"How does that feel, big brother?" she taunted. "Is this more relaxing for you?"

He begged her to stop, but she only laughed and sat on the lid, causing it to slam down on his balls. She jumped up and down, crushing them further as he writhed in agony.

"Stop it, please!" he cried. "It hurts!"

But she didn't seem to care. She continued to torment him, only releasing his balls when she was satisfied that she had caused him enough pain. She gave them a final, painful squeeze before standing up and dusting off her hands.

"What a wimp," she said, shaking her head. "I can't believe you couldn't handle a little prank like that."

The brother was left in agony, nursing his crushed balls as she left the room, laughing at the memory of his pain. He vowed to never jerk off again, at least not while his sister was around. He had learned his lesson the hard way.