To the best of my understanding here is how to do it. First your wife will need her own Gmail account to do this. She would download the app and install it. Next you would go to your phone and in the app there is a place to invite other household members to see the cameras. You invited your wife using her gmail address and then she can sign into the app on her phone using that email address and she should be able to see your cameras.
If this works please return here and let us know as this could help other people.
