I highly doubt she's a time lord. I also had the momentary inkling she was Amy, but dismissed it outright as silly. I absolutely love the character though and was extremely happy Moffat brought her "back". If she stays as a character for too many more years though, at some point they may have to reboot to her younger years with a new actress.
I hope at least not for a while though, Alex Kingston is smokin' and hella cool.
I hope at least not for a while though, Alex Kingston is smokin' and hella cool.