Sure. There are a couple of kids in our group that have their Generals and Extras. It can be done!
Sorry, but that would definitely be illegal. Have her get her Tech license and you could talk over 2 meters with repeaters. Or, alternatively, get a GMRS licence since that covers the whole family, and use good radios with external antennas for better range. Most areas in the U.S. have GMRS repeaters, but you usually have to join a club or otherwise get permission to use them, but that is usually not a big deal. Jenny Everywhere is right, your method is only legal if she is right next to you and you say “third party traffic” and your call sign at the beginning and end. You would be responsible for whatever she said over the air.
Great article! I think a bit more info about solar panels to keep a deep cycle battery charged up in a grid down situation would be good. Costco just had some large ones on sale on their website. I am keeping two of these in the garage for any power outages, short or long term. I keep two large deep cycle batteries from Costco charged up under normal conditions with trickle chargers/maintainers. That way I am ready to go at a moments notice….