Someone sent a message to 4 friends on Facebook. It wasn't me, and couldn't've been me, since I was driving at the time. Nobody else has access to my account. The only 2 devices that are logged into this account were on my possession. Under "security", I can see no unrecognized location. The message was a link my girlfriend sent to me yesterday!
What does this mean? If my girlfriend (or anyone, really) somehow accessed my account, shouldn't it show on "security"? That doesn't make sense at all.