What all do I need for wireless internet for my laptop?

Yes if you get a router you will have a connection for your wireless laptop

Most late model laptops have built in wireless roaming that will find wireless signals from wireless routers, you need to buy a wireless router , preferably one with 2 antennas one receiveing and one sending for better performance , if you laptop don't have wireless roaming built in you will need to buy a wireless card for your laptop , or hard wire it directly to the router , in that case you don't need a wireless router

You can also get a wireless USB adaptor for your PC, like this one: http://www.netgear.com/Products/Adapters/GWirelessAdapters/WG111.aspx

It will pick up the signal from a wireless router.

You would need to get a wireless router, which plugs into the internet connection she already has. then you can get a wifi card for your laptop, and you are set