Is it the expense that means you don't want to buy a network card for her laptop ? It would only cost like $15.

Other alternatives are one of those USB-USB networking kits.

http://www.trianglecables.com/usblinfiltra.html
http://www.cwol.com/usb/usb-2-usb-data-link-file-transfer-cable-uc250.htm
http://www.usb-ware.com/usb-2-usb-data-link-file-transfer-cable-uc250.htm

You could also get an adapter for the 2.5" drive in her laptop and connect it to your desktop.

http://www.cablesonline.net/25hdmounkitw.html
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