As Jack sat there, Brittany grinding away against his crotch while she and Hannah made out, his mind drifted towards the idea of using the device again. There didn't seem to be any downsides to altering reality thus far, at least, not that he could see.
Even though Hannah had expressed a desire of being huge and muscular to him in the past, she also seemed perfectly content with exploring their neighbor's impressive physique, too. Maybe in this reality, she was more of a muscle growth enthusiast, rather than someone who wanted to devote the time and energy required to become a bodybuilder? Which was fine with him, as far as he was concerned.
Besides, it seemed that Brittany really loved the idea of her body turning them on so much. "But what if she was even bigger?" Jack thought to himself. "Could she be even more of an easy gainer, could she grow even larger?"
His mind began to wander. He imagined Brittany in the gym, capable of lifting hundreds of pounds with ease, able to bench press over a ton without breaking a sweat. How large would she be then? What if the idea of Brittany growing larger turned her on even MORE than it did now, if it spurred her on to lift heavier and heavier weights, if she pushed herself even harder in the gym?
The device was in his hands. Jack had a clear image in his head of how Brittany would look, but just then, Brittany leaned back and stroking his cock over and over again. Lost in the throes of ecstasy, Jack managed to push the button just as he was about to climax, the bright flash returning, bathing the room in its light, temporarily blinding him.
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When his vision returned, he was back at his desk, the device lying in front of him. He heard the door creak, followed by the familiar sound of his girlfriend's voice.
"Hey, babe?" Hannah called from the other room. "Brit picked me up from work and we decided to rent a movie. You i-hnhhhm?!"
Jack quickened his pace like before, but this time he knew what to expect. Breaking off their kiss was Hannah, still as skinny and slight as she had always been, ogling their neighbor's massive physique and Jack couldn't blame her. He couldn't believe it. Brittany was already the size of a female bodybuilder BEFORE he'd decided to alter reality again. Now, Brittany seemed to be...