The user_relationship module can be used to create relationships among users . More on this over here . Now there is a problem with this module , let us take a case for example . If X has a relationship of 'father' with Y and Y has a relationship of 'son' with X , where X and Y are users on a drupal site . Now when we access the page /relationships or /relationships/list the module lists all the relationships of the present user . But the mistake is , for X the entries would be