get_pages returns no children in additional multi sites

Hi there

I am having a few issues with the get_pages function within a multisite set up.

I have an dropdown that contains the parent pages. When a parent page is selected, it then gets a list of child pages via AJAX and displays them in a seperate dropdown.

The function called by AJAX in my functions.php file is below.

function implement_ajax() {
	$id = $_POST['id'];
	$product_selector = array(
		'post_type'   => 'pcct_product',
		'child_of'    => $id,
		'sort_column' => 'menu_order'
	);
	$aPages = get_pages($product_selector);

	echo '<option class="first-option" value="">Select Product</option>';

	foreach ( $aPages as $pagg ) {
		$option = '<option value="' . get_permalink( $pagg->ID ) . '">';
		$option .= $pagg->post_title;
		$option .= '</option>';
		echo $option;
	};
	exit;
};
add_action('wp_ajax_my_special_ajax_call', 'implement_ajax');
add_action('wp_ajax_nopriv_my_special_ajax_call', 'implement_ajax');

When I tested this and put in an ID from a parent in the initial site, it returned the children from the parent from that site.

As soon as I entered an ID from a parent page from the second site it returned no children at all.

I think this is because get_pages is looking in the initial site for children of an ID that only exists in the second site.

I’m sorry this is long winded, I hope i’ve explained it as best i can. Has anyone any suggestions of how to make get_pages search the correct site??

Many thanks