I haven't read all posts but as said I doubt VERY much she had a License for a motor bike, I'm seeing young Tourists here on Koh Chang everyday, driving motorbikes, it is so obvious they have no experience, ( I could have easily killed 2 last week, luckily my car has very good brakes, ) incidentally down at the ferry port a few days ago, there is a motorbike rental place and the cops were there, checking if they had a license, before they could rent.