I think that's what's going on. It reminds me of an artist I recently found on Danbooru (the subject matter, not the art) who's done many similar images with the real Touhous...
Well, there was that one series where the family is caught on a rock in a flash flood (well, of yukkuri proportions) for several days. The parent Reimu did Eat Up Easy, although the parent Marisa was still there.