I bought a new MBA yesterday, and setup my 2010 MBA to my wife. I'd like to install Lion on her's as well as our Mac Mini, but it isn't working for me. My understanding is that since I already own Lion, I should be able to install on my other Macs. I have put all three under my same Apple ID, but it does not give me the option to upgrade the other Macs. I tried making a recovery USB drive from my new MBA, and when I boot up with my old MBA, I input my Apple ID and it says that this Apple ID has not purchased Lion. Obviously when I look at the App store with my new MBA, it says that Lion is already installed, and does not give me an option to re-download it. What do I need to do?