Ember Simple Auth when all pages requires authorization

I have website that requires authorization on all its pages. To achieve that there is server that response based on cookie. If there is cookie send ember app, login site otherwise. This allows to facebook like behavior. I am using ember-simple-auth addon to help with authorization.

Since user is never inside app without being successfully authorized, one should be able to save ember-data record object into session. This works nice for one tab but breaks horrible with multiple tabs. Is there way how to have ember-data objects in session and yet support multiple browser tabs?