It  is  unethical  because   when  their  parents  are  out  she  should  not  make  any  party . Or  maybe  she  could  but  still I  do  not think  so . I  do  not think  his  email  is  so private . In  this  times almost  everyone  can  get  to  others  email . And  when  the  school officials  know  it  it  is  go in  to  effect  him  in his  reputation  in school.