Jaime grinned a little, and she guessed that was fair. It wasn't like she'd provided him with a list of tricks she could preform, so it wasn't as though she could expect him to come up with a spell. Like hey, accio me that towel or something.
"Turning it to stone work for you?" She asked. That was solid, and not ice, and outside of freezing water, she wasn't sure how else to manage solid water.
She guessed she'd start with stone and then if that didn't work for him, she'd try something else. So she shifted slightly, and since it was a larger undertaking than say, turning a curtain to stone, she'd have to focus a little harder on it.
Regarding the water, she leveled her wand at it briefly before she flicked her wand and murmured the word to turn the water to stone. Belatedly, she hoped she recalled the counter-spell, or that a finite incantatum was going to work on it. Otherwise, people'd be cranky. But then again, she wasn't exactly a stranger to that, either.
She watched as the water slowly began to shift and darken as it oh so slowly turned from water to stone down the length of the pool. Jaime made a little face before she shrugged slightly, and once it was done, she gestured for him to proceed. "Solid as a rock," she assured him with a grin.