After Snape finished shopping for clothes with Rhea Walker, Rhea suggested visiting Hogsmeade, so Snape took her there by Apparition.
In Honeydukes Sweetshop, the two of them ran into Dumbledore and Grindelwald. Dumbledore's embarrassed expression formed a sharp contrast with Grindelwald's smug one. They all nodded politely at each other before continuing with their shopping.
Rhea thought to herself that Grindelwald was quite something—making rapid progress indeed, already able to take his old man out for sweets.
Chapter 29