Quick question on ipod sync

[dcfly]

This is going to sound silly, but here goes: My girlfriend has an ipod which she uses with her Mac/itunes. She is afraid if she plugs her ipod into my PC/MediaMonkey it will reformat the device and she will lose everything - or something similarly terrible will happen. I'm not sure, to be honest, what will happen. I've read through the documentation but I'm still unsure what to tell her.