Give her confidence.
Instead of telling her who she should be -or how she should think- mention the qualities that you see in her, and inspire her to build on those. Do not tell her what to build though, one can not foresee outcomes.
Give her confidence. Record your support and believe in her.
Ask for teamwork.
Another thing that comes to mind - is that in case your wife and/or daughter have arguments you won't be there to calm the situation or negotiate. I'm sure they'll experience a lot of stress when you're not around, but they could use your comfort. Intentions matter. Instill both parties with the motivation and will to corporate, no matter how tough the times may be.