Is the Shown location of your phone on find my friends accurate if the the phone is offline
If she didn't have Find Friends turned on (it is on by default so she would've had to turn it off) then what you're seeing is the last location the iPhone reported whenever it reported it's location last.  

If she's looking at it thru iCloud, perhaps she does have the Find My iPhone installed.  This is where a user can locate their own device.  The device needs to be on and online to report its location.  If she see's her iPhone and it has a green dot, that means it's currently online.  If it's a gray dot, the iPhone is offline.  If it last reported its location within 24 hours, you'll see the date/time.  If it's longer than 24 hours, you'll just see 'offline'.