Mac OS X is the operating system that came installed on her MacBook, yes.
Parallels, Fusion, and VirtualBox are not updates to Mac OS X -- they are 3rd party software that must be purchased and/or downloaded and installed on the MacBook.
BootCamp is a utility that comes with Mac OS X that will allow one to install Windows onto their Intel-based Macintosh computer (MacBooks are Intel-based). There are nice instructions on Apple's site (apple.com) that can be found with a simple search for "BootCamp."