"What if ..." She stops for a moment, still grinning, as she works out the details, "What would you think about me initiating my power? I could carry you on my back the rest of the way up the cliff."

She hasn't had a chance to use her powers in the field, to start, and it'd be helpful here with her increased strength and dexterity; he'd be hardly any weight on her back and she could take the incline at ease.

But she wasn't going to assume; some people liked doing things themselves for the challenge (herself included), so she wanted to float the idea to him first before jumping right in.