Found: Wharton-esque Americans in Italy

I’m trying to find the title and author of a Gilded Age story/novella, in the style of Edith Wharton, probably written in the late 19th or early 20th century. I don’t think it’s by Edith Wharton, although it could have been. At first I thought it was The Light in the Piazza by Elizabeth Spencer, but it’s not.

Two American matrons have taken their eligible daughters to Italy, no doubt to find them husbands. The setting is a light filled piazza, and there is a lot of backstory as the two mothers talk. They have known each other for a long time; they are friends, but not really. The dramatic climax is the discovery of the (adulterous) paternity of the socially superior daughter.

Thanks for any help.

>1 christinedux: I'm pretty sure it's Wharton's Roman Fever.

https://en.wikipedia.org/wiki/Roman_Fever

duplicate thread https://www.librarything.com/topic/340970

That's it. Thanks so much. I do a read-aloud in the library of my retirement community. It will go well with tea and cookies.