1. A method of granting a first user temporary access to a second user's electronic content, the method comprising the steps of: receiving by a Policy Engine, a request originating from the first user to access the second user's content; retrieving by the Policy Engine from a relationship database, relationship information regarding a relationship between the first and second users; applying by the Policy Engine, an access rule matching the relationship information, the access rule specifying a period of time the content is available; when the specified period of time has not expired, the Policy Engine granting the first user access to the second user's content; and when the specified period of time has expired, the Policy Engine denying the first user access to the second user's content.