Emily stops at the last second

The pleasure mounted and mounted. Like a dam on the brink on bursting, Dylan steeled himself for his sister's threats. Except her fingers stopped at the last possible second. His cock throbbed and balls yearned for release.

"Emily, thank you. Now, please, just let me go."

"Don't worry, I'm not about to make you lose immediately. This is going to be a fun week!" Emily said and finally got off his thigh. The rope also turned into dust. Dylan was finally released, but as he was leaving his freakish sister, she said, "Don't forget. One week. I'll know if you break the rule."

Dylan returned to his room and got dressed. His genitals ached for release, and the sensation of her soft fingers played in his mind endlessly. Why was he cursed with such a horrible sister? Dylan washed his face with cold water. Just one week without busting a nut. How hard could it be?