When Julien heard Helena's arrangement, he knew that she wanted to spend some time alone with Charlie. If he had any common sense, he would do as she asked.
Moreover, given the current situation, Julien knew that Royce would not have a chance of winning Helena's heart, and his family could completely rule out the idea of marrying into the Nordic royal family.
Julien's strength lay in his awareness of the situation. Since something was already beyond repair, he certainly wouldn't waste any en