You may have shown her how to operate it, but that's no guarantee that she'll remember it when she needs it!
So, put it in writing: Photocopy the pertinent pages from the owner's manual, laminate them (optional), put them in a heavy-gauge plastic pouch, and zip-tie the pouch to the outside of the generator. Make sure that the instructions include info about adding oil (and what happens if you forget!), how and when to use the choke, how to disconnect all loads before starting or stopping the engine, etc. As previously mentioned, the info should also include a list of appliances that it will and won't be able to operate simultaneously.
Also, it would be good to have all essential generator accessories packaged together, and stored next to the generator - things like a fuel siphon and small gas can, several quarts of oil, one or two long, heavy-gauge extension cords and half a dozen shorter ones, a theft-resistant cable and padlock (if the generator will be operated in a location that is prone to theft), and a small fire extinguisher.
Next, make sure she knows how to siphon gas out of the family vehicles - and then make sure your siphon actually works with your vehicles!
In short, buying a generator is like buying a firearm - Without accessories and preparation, it's not much use.