Ah, the beauty of it is, that properly configured, you could log into her computer and access it without interaction on her part.
I'm sure others here on PCMech have their own ways of doing VNC, and can assist you, but I choose to use a third-party program, UltraVNC (the other *VNC programs work just as well, though).
In a barebones string of thought, all that needs to be done on the server is installation of the server program, and opening of required ports (both on router, and windows firewall).
I shouldn't hijack this thread with needless details, so I'll PM you some other information
