Originally Posted by GandalfTehGray
So signing into her Google account did nothing? I know my Gf uses my account with no problem, made a playlist just for her last night that worked fine. If nothing else works for you try out video2mp3.com
Can you give me a bit more info on what exactly you are doing? I went to settings, accounts, add google account, and then I input her credentials (all on my Galaxy Nexus). I then unchecked everything so her contacts / email / etc don't sync to my phone. To check that it worked, I went to Play Music and switched it over to her account. It got rid of my library and showed me hers instead.
Is this the correct process? How does doing those tell my Music Manager and Google Music account that our two accounts are linked? I am on my computer now and I copy the song into the My Music folder. I open music manager and it says it can't upload due to being from another play account. I'm logged in to Music Manager via my Play Account.
What am I doing wrong? Can you explain what you and your GF did?