Is the lady with the garden hose threatening the little girl with a shower if she doesn’t sit still for the photographer? An empty threat, almost certainly, since water would ruin those hats. (The young woman in the center does seem to be shrinking back a bit though.)
“Gardens alongside the Rhine River, Coblence (Rhineland-Palatinate)” , via Bibliothèque de Toulouse Commons on flickr (cropped slightly by me).
The Bibliotheque‘s flickr page gives Eugène Trutat as the photographer, but M. Trutat died in 1910, and the women’s dresses seem to be from the 1920s, maybe even the 1930s.
“Famille attablée sur la terrasse, ombragée par une bâche,” (family at a table on a terrace, shaded by a tarp) ca. 1890 – ca. 1910, by Eugène Trutat*, via Bibliothèque de Toulouse (cropped slightly by me).
*I was skeptical about the photographer because Trutat died in 1910, and the women on the left appear to be in the shorter dresses of the 1920s or 30s. However, they could be wearing the bathing suits of around 1900.