new WP_query using custom fields

Question

This is what works in my query:

<?php
    $argsfeature = array(
    'post_status' => 'publish',
    'post_type' => 'page',
    'order' => 'DESC',
    'posts_per_page' => '1',
    'meta_key' => 'featuring',
    'meta_value' => '1' 
    );

    ?>

and this query works:

<?php
  $argsarticles = array(
   'post_status' => 'publish',
   'post_type' => 'page',
   'order' => 'DESC',
   'posts_per_page' => '5',
   'post_parent__in' => array(10,11)
    );
 ?>

what isn’t working is “rewriting” the 2nd query listed above where I can get the child pages of 10 and 11, BUT NOT the pages that have already been pulled from the “featuring 1” query – the first query listed above.

Thank you so much for the help.