Apparition d'un dossier "Library" sur le bureau

Hi

Every time I start (or restart) my Mac Book Pro M2 (2023), a "Library" folder appears on my Desktop.

Its owner (my wife) has no account on my Mac (she is not a user) but I share with her my Calendar and our Contacts.

Is there a way to make it stop appearing?

Note: That "Library" folder contains various folders, all empty except one "Preferences"

Thanks in advance