Look up Cosgrove and I also started on New Rules of Lifting for Women, which I recommend to newbies all the time.
Free weights, barbells and general working out around deh menz can be intimidating for some women when they first start (was for me at least). New rules was like a weight lifting primer (full body 6 stage program geared at recomposition) including the sappy "you can do it too!" BS. But it was very helpful for getting over the whole "I feel like a tool being the only woman in the weight room" bit and the "wtf is push press". It has pictures and talks about food, etc. I really dug it. And after I finished that I went on to Starr's 5x5.
However, since she already has you to show her the way around the weights, she might be ready for something more... I would recommend talking to her about her goals and then like cbear said, finding something she's going to stick to, and of course, letting HER figure out what she wants to do.