Automatically added the product when other product in cart.

Hi, i need to add one product when other product is in the cart. For this i write the following code

function add_product_to_cart() {
      $cart = WC()->cart->get_cart();
	 $cart_total =WC()->cart->get_cart_total();
	foreach( WC()->cart->get_cart() as $cart_item_key => $values ) {
	$_product = $values['data'];

	 if($_product->id =='15507' ){

	WC()->cart->add_to_cart(39325);
					}

	}
}

add_action( 'init', 'add_product_to_cart' );

Could you please tell this code is correct or not . Also there is one problem , when the customer delete the auto added product form cart , it will not be delted because of this code . What is the best way to solve this . Please check .

https://www.ads-software.com/plugins/woocommerce/