Force user to log in on certain pages

Hi Folks

I've just started out demoing Sitefinity for a client project however for the life of me I can't figure out how to force a user to log in when they access a particular page..

Ok I can drag a Login widget on to a "login" page, Create the secure "client" page, set its permissions to only allow "Client" roles to view etc.. but I need the client to click the client page and be prompted for a username and password if not authenticated. Sounds fairly easy however the default navigation hides the client page when not authenticated so I cant force the login..

Any ideas?

Cheers
James