Unwanted sharing of google account through Apple ID
My wife and I have two separate AppleIDs for our iPads.
Each has a unique ID with a unique email.
My wife just got an iPhone and a couple of days later my (gmail) emails started showing up in her gmail inbox.
Neither of us initiated a request to share.
The gmail app itself does not show other IDs, but somehow my emails show up in my wife's gmail inbox.
What makes this even more strange is that her gmail emails don't show up in my gmail inbox.
How can this be corrected so that email is no longer shared?
iPhone 12