Why does my shared family member's image appear next to my name on emails I se

When I use mail app on iPad, iPhone and MacBook Pro, my spouses image which is used on her contact page, appears next to my name. My wife and I have a family share account for iCloud storage. This is the situation when composing email on my MacBook Pro. When I use my iPad and iPhone to compose email, the image as well as her name is listed as the sender. How do I correct this so that only my name is listed.