"Sonya, I want you to become just five feet tall." Derek finished.
"Oh!" Sonya yelped, the ruby glowing again. She hugged herself tight as the wonderful warmth returned. "Oh man... this feels insanely good."
"It looks like fun." Derek smirked, seeing Sonya's closed eyes expression of delight.
"Oh... oh!" She blushed. "Here we go! Here we go!" Sure enough, Sonya began to shrink again. She audibly compacted, her flesh and bones tugging and pulling as she shrank smaller. With a yelp of slight pain, she grimaced as she compressed, grabbing hold of Derek's chest and pulling tight as she shrank against him, dwindling by the second, until the once 6'3" beauty had been reduced to just five feet in height. She looked exactly the same as before, just on a smaller scale.
Derek looked down in shock, his mouth hanging open, and Sonya looked up at her lover with equal surprise.
"Whoa." Derek finally gasped. "You're so little! How do you feel?"
"Feel..." Sonya considered, her voice just a teensy bit higher. "Well... I feel... small. Helpless. Hold me!" She commanded, and threw herself against Derek with a giggle.