Katie looked down at the green blinking digits on the watch: "5.50"
She smiled as she realized that the answer to all her relationship problems with Jake was literally in her hands at this very moment. The power dynamic was about to shift her way for once. Still grinning, Katie gave a low whistle over to Jake as she clicked the down arrow rapidly and locked in the more humble "2.75" that would place Jake at half the man he used to be. She didn't see herself as cruel for this: this watch was simply a means of balancing the scales, and Jake had plenty of sins to atone.
Though, there was an obvious victim in all this; Liz had just recovered from the last radical size shift when Jake's once-monstrous cock shrunk again to thumb-size. At first, she thought Jake had gone limp and that he must have been the ultimate grower. She pulled her head back, and let out a small yelp of surprise when she saw Jake's tiny member, hard as a rock. Her yelp turned into a laugh as her memories of the big-dicked Jake began to fade like a photograph left in the sun. She couldn't believe that she was ever jealous of Katie: Josh was not only fitter and taller, but he was three, maybe four, times bigger than Jake's most generous measurement. She leaned back to Katie and began laughing, pointing at Jake's rigid little dick with her thumb. When she finally caught her breath, she mouthed over to Katie "you poor thing." To add to Katie's embarassment, her tiny-dicked boyfriend chose this moment to spurt out the tiniest load while nobody was even touching the little thing. His already-too-small penis shriveled up into a little acorn nub with no shaft in sight. Josh couldn't help but join in the laughter at that.
Suddenly, fury swallowed Katie whole. Her ego demanded to put Liz back in her place, so she clicked "^" on Jake's registered size. An error message popped up, informing her of the 24-hour rule. Frustrated, Katie refused to be beaten.