Especially the scarpbook suggestion is great.
No much to ad, but one thing that helped me get into it back in the film days.
I would start her on the 5Dc with, if you can spare it, a relatively fast normal range prime (say 50, 1,4).
Explain in simple terms the way to manipulate the amount of light in manual (f-stop, speed, iso).
Put the camera in all manual and off she goes.
It may be a little bit rough, but it will help her to discover the basics quickly (as she can always go for direct feedback and look at what she did after each shot). Zooming you can do using your feet, the fast prime allows her to discover and explore DOF.
Sharing progress in choosen intervals will help, and if you can afford a couple of hours, try to agree on a "project topic" that both of you cover usinf equivalent equipment. Not to show of, but to share different views to the same general idea.
Has become more than a bit, but here you go.
Mind to share the outcome of your project (if it stars)?
Have a great day
Yeah, this is similar to what I was thinking. Perhaps let her get used to the camera in P mode and then quickly push for her to experiment with M and do some exercises with varying shutter, aperture and ISO so she understands the exposure triangle and how changing each aspect affects the picture Blur, DOF and Noise.
I think starting with a prime is good so it forces her to think more and then later she will appreciate what the zoom does for her. I also prefer the 5Dc with either a 50mm or a 28mm. IMO, the 28 is a bit more forgiving.
As for books, I'll likely give her one or two from Kelby or Peterson to start off. There's also an easy read from Joel Sartore about photographing family that I think is a good start. I will also encourage her to start looking at as many photographs as possible online or otherwise to see what she likes about them and start considering how they were made.
Using YouTube, etc are great ideas as long as she understands what she is learning and is comfortable with using the Internet a lot. I'm not sure about that. It also depends on how much time she has to dedicate to this venture. I honestly hope I can sell her a few things to start out with like I started out myself with my 'mentor' friend. Sort of a win/win.