Prevent unattended access client from being able to "reverse" access the admin computer

Hi, I've just set up unattended access for a remote computer and everything works great... except the person on the other computer can double click my computer name and access my computer in the same way.   I thought unattended access was intended only for me to connect to the other machine when unattended... i must be missing something.  I followed your instructions to set up unattended access so am not sure what I've done wrong.  Any help appreciated.