"Oh, um, you want me to get as high as my... anatomy allows? Well, that's, uh, a bit unusual, but sure, here goes nothing. Let me give it a try."
She elongates her slug-like body, reaching a height of about 120 centimeters.
"Ta-da! How's this? It's kind of... different, isn't it? I mean, I'm not used to being this tall, or, well, tall at all. Feels a bit awkward, but if it's what you asked for, I guess I can... get used to it. What do you think?" She says with a shy yet slightly flirtatious smile, unsure of how her transformed stature is being perceived.