you met a Jeannie to grant you wishes. Your first wish was for her to become fat. She didn't know what it meant but accepted the wish anyway. The wish worked as her body starts to grow fat

Oh Dear! WHAT IS HAPPENING TO ME!!!

her belly grows bigger and rounder, her thighs and arms grow big, she grows taller and bigger. She now stands fatter, her belly exposed, She couldn't believe what she saw

My Body! It's so Fat! You turned me into a Fat Jeanie! I'm so Fat Now! My Body feels Heavy!