The Real Thing immediately takes her place, which means that Lapis has suddenly found herself standing in the lake. The water construct collapses with a splash, followed by a smaller one as she stumbles slightly and catches herself. This sort of surprise is just another part of the bullshit she's having to get used to, it's fine.

She stares down at the water for a moment in reproachful startlement, then up at Ange. Then she buries her face in her hands for a long, loud, exasperated groan.