You didn't like being a kid the first time, you sure don't want to have to repeat it all. "Please make me older."
Red shrugs. "OK. I'll make you older, but once I'm done you're stuck, OK?"
You nod, hoping that she'll restore you back to your old self. You feel yourself changing again, and start getting taller. 10, 11, 12.. You go through puberty in a matter of seconds, and shift uncomfortably as things get tight in your pants. 13, 14, 15.. Whatever she is doing, you aren;t becoming your old self. You still look like the same boy, just older. Well, something else isn't quite right. Your eyes, your expression... you blink as the change stops, leaving yuo looking about 17 years old.
You look down and are amazed by the size of the bulge in your pants. Red was quite generous in retoring puberty, and your body is trim and lean. But your clothes are dirty and stained, and when you look back up in the mirror, that oddness remains in your face.
Red giggles. "OK, now you're a big boy where you wanted. But in your head you are still 9 years old! And that's how you'll stay from now on!"