An Unexpected Power 242 (Patreon)

Having done enough studying for the evening, Katie stood. She hadn't grown in more than a day and felt like giving her body a wonderful stretch of her arms. Up...up she went, rolling her shoulders to lift her biceps above her head. She felt good...extremely good actually, but had no clue that as she flexed her thighs and went on her tip-toes, she was actually growing a couple centimeters larger. The warmth faded...and a new sensation took it's place.