Yeah, and that’s one of the things many within the community have requested (among other things) in an extensive Wishlist topic:
If there is, then I’m not aware of it. I imagine something like that might be helpful to a lot of users, but I haven’t seen one.
While it violates security best practices on both counts (disabling two-factor authentication [2FA] and sharing credentials), this is apparently what a lot of spouses do in order for each person to have full access to all camera features, for instance. Using the same account might be a problem if you had devices like Scales, but for just cameras this is the way a lot of couples work around the limitations of shared cameras.
You can also just log into your account on your wife’s phone without disabling 2FA and “trust” the device while doing so. As long as she doesn’t log out of the account/app, there shouldn’t be a need to login again, and this should provide some additional security for the account.