Marko - you said she isn't a knifenut, so would she even use a stone? If she's going to have to maintain it herself, a strop and a rod might only go so far. Please don't shoot me for suggesting it, but what about a "sharpening system," like the sharpmaker? Easier to use than a stone (at first), and it'll give her a working edge for quite a while, and she'll do minimum damage to the knife when using the system.