Can you share more information about your email setup.

Do you and your wife share the same phone and have each others accounts added within the Thunderbird for Android app. Do you have seperate Android user profiles on the phone? Are you using the Unified Inbox feature?

When you say your wife is getting your emails on her gmail account, can you clarify what you mean? Are you saying she's being copied on every email you receive or send from your account?

We have separate emails and mobile numbers. I get my normal emails but she also gets my email even though I am the only one showing in the address line.

There's no setup or configuration within the Thunderbird mobile app that would create the result you describe.

It sounds like a rule might be setup in your webmail settings or desktop client that's automatically forwarding emails to your wifes gmail. Check there as a first step.

Without knowing your mail provider or desktop client, I can't offer specific guidance. I've linked to some examples as a stear on what to look for.

Gmail email forwarding: https://support.google.com/mail/answer/10957?hl=en

Thunderbird desktop rules: https://train-your-skills.com/thunderbird-how-to-forward-mails-automatically/

Thanks for your input. The problem was that my email account was listed on my wife's Gmail. I deleted it and problem solved.