The least fun response is "Don't buy anything but use the camera for a bit."
But it's true.
She needs to learn about shutter speed and focus modes.
If she doesn't, she'll likely "get a few good photos and some meh photos".
Why are my photos sometimes in focus?
Why are the blurred?
Why isn't it focussing fast? I thought DSLR's focused faster?
Honestly, get her a good resource so she can
a) Learn how to look at her shutter speed and know, "Oh shit. That's too slow. I'll have a blurry photo. I better up the ISO to make the shutter speed faster!" (Or, learn how to turn on auto-iso)
b) Learn how to use her focus modes. Auto Focus will lead her to "Why isn't it focusing on what *I* want?" Learn about Continuous-AutoFocus so she can have the camera track moving objects
c) Learn how to turn on burst mode so she can take a burst of photos at moving subjects.
If she has any queestions, post here. If she has photos turning out how she doesn't like them, post examples and wee can help.
I completely agree with the above. Best thing to do is to shoot some and examine what you actually need vs. what you thought you needed. But Groove is like, rolling in $$$ if his video card purchases are any indication, and there is very little risk in buying the 35/1.8G (very easy to resell), so I'd at least start w/ the 35/1.8G in addition to the 18-55.
Also, something very overlooked is flash--a real one not that built-in one that blasts people in the face and makes them look horrible. Many people spend $$$ on bigger sensors and faster glass, when what they really need is more LIGHT in the first place. This means a decently powerful flash to bounce off the ceilings sometimes, or via modifier you can even point it elsewhere. You can get a cheap manual one if you know what you are doing, or something like an SB400 if you don't... but don't get th SB400 right away, try to learn the basics first.
A tripod is another way to get more light, as long as your subject doesn't move.
Once I got a good flash and tripod, my hankering for full frame sensor completely disappeared. FF is still good when you can't use flash, though.