How to sync two computers with iTunes?

On my laptop, I have iTunes and I use it to sync my iPod and iPhone's music, it's taken me a long time and money to collect my music library. My sister also has a laptop and recently got an iPod for her birthday. I want to have the same music I have in my iTunes library on my sisters laptop. But when I downloaded iTunes to my sisters laptop, I couldn't find an option to sync two computers, how do I make my laptop and my sisters laptop have the same library all the time wirelessly and hence be able to sync my iPhone, iPod and my sisters iPod with either my or my sisters laptop.
Thanks for all answers, they are much appreciated.

This is an easy one. Ready, get a memory stick large enough to put all your musician on it, open your documents and look for the iTunes folder, left click to highlight it then right click and scroll down to send to, look for your memory stick that you should have connected to your laptop and send the entire folder to the memory stick, it might take some time depending how much music you have on it. When finished put stick in your sisters laptop and load it on there, all your music will now be on both laptops, hope you can understand instructions, good luck

Kellie is right, you can also turn on home sharing on both computers in iTunes and share the songs that way
http://support.apple.com/.../kb/ht3819

You are only allowed to sync devices with one computer
HTH
David

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