to be honest youre lucky the drive didnt throw a wobbler. the amount of drives that ive had in recently that weren't edjected from a mac and disconnected and had to do full data recovery on is unreal.
Either I've been incredibly lucky, or you've been incredibly unlucky. I end up doing this a lot and I've never had to do a recovery at all.
She's never opened Lr on her side. I normally do all the os updates but she did it from her log in last time and it's all a bit messy now. It reset loads of permissions and was a royal pain in the bum.
I'll let you explain that to her then!!