Silvia stayed on the balcony while deep in thought. Her exchange with Klaus didn't alleviate the heaviness in her heart. If anything, it only left her with a myriad of unanswered questions and doubts. It just didn't make sense to her. However, there was a point that was clear to her.
Regardless of her personal issues, she was still currently the king's wife. As Stefan's wife and royalty, Silvia had to protect the court from collapsing while the king was in the war. Many officials already declared their opposition to Stefan's participation in the war, especially without a son and heir.
Claude might be the current crown prince and Stefan had already declared Claude his official heir. But despite that, many didn't support that. The only reason everyone just accepted that fact was that they were terrified of Stefan. Now that he was away without a guarantee of return, Silvia's duty was not only to protect the young Claude, but also to keep the order in this kingdom.