Gmail app from iPhone Camera app defaults to wrong email address

Hi,

Ever since the latest update, my iPhone7+ defaults to the wrong "From" email address when
I want to send a photo.

I take the pic, view it, click the share button, click GMail and the "From" is my wife's email address, not mine.

I have her email account in my iPhone.

My iCloud account is correctly set to my email address.

How do I change Camera in my iPhone to use my email address and not my wife's?

Thanks!