I would say that it's doable, but it would not be worthwhile, or anywhere near easy. There is a lot involved. Rotors, Calipers, shock mounts, sensors, brain, wiring, pump... much better off just buying one already set up with ABS. It's not very economical to retrofit, and would likely cost a mint.
Start by getting her some really good tires.
2007 Versys Black, V35 Bags, H&B Bars, Skidmarx Hugger.Fender Ex., Avon Distanzia, Braided Lines, Hella 65W bulbs Arrow Can, DNA Air filter, GIVI tall screen (for winter), PCIII, Baldwin Saddle. **SOLD**
2011 KTM SM-T. Crash bars, E55 Top Box, Fender extender front and rear.