iPod touch Kinda an ipod, kinda itunes question

You would need to "Export" her library on to a USB or External hard drive and copy it over to her new Laptop, since a iPod CANNOT be synched to 2 iTunes library's

http://support.apple.com/kb/HT4527

You can have up to five computers authorized for each iTunes account, too.

iTunes 11

With iTunes 11, you can drag and drop files from anywhere into your iPod. It works great for me because my iPod stopped syncing with our old computer and when we got a new one I couldn't change computers without wiping all my app data. It even works with files from outside of your iTunes library, just have iTunes and the folder containing the desired files running side-by-side as minimized windows, then drag the files from the folder into the iTunes window and drop them into your iPod. Just make sure you've selected iPod>On this iPod>Add to... and you're set.