A month after Lisa Marie Presley's death, a source tells ET her daughter, Riley Keough, and mother, Priscilla, are not on speaking terms, due to a battle over the late singer's trust. Priscilla's challenging the validity of Lisa Marie's most recent will, which removed her as a co-trustee of her estate and named Riley as the soul trustee. ET's source says, Priscilla's only doing what she feels is 'right in her heart.'