... starting tonight, I'll shrink at the same rate of Megan's growth (1 inch per night.).

You decided not to make the wish alter reality to adjust to your new height. It was just too fun to see how people would react to watching you get shorter and shorter.

With the anticipation and excitement, you get the decide to wish yourself to sleep, and promptly drift off.

...

Waking up, you feel well rested and cozy. Suddenly remembering your wish last night, you hop out of bed to check your results, and you can immediately tell your perspective is lower, and much more significantly than yesterday. On top of that, your boxers feel quite loose.

Quickly grabbing the tape measure that you left on your dresser from yesterday, you confirm your height: 5'8", a solid 2 inches shorter than normal. And that's when you remembered that with Megan's continued growth, you'll be a full 3 inches shorter than her 5'11”, you could hardly contain your excitement.

You check the time and notice it's already 9:15am, and you consider texting Meg to tell her your "surprise."