Karly and The Growth Spell!

What about Karly, who accidentally cast a spell which will make her grow into a giantess and out of her clothes!

It reacts to her wearing clothing, and makes sure that she grows until said clothes rip off or she takes them off! She'll go back to normal size if she's naked, but that might take a while, so hiding will be tricky!

What's going to happen to Karly?