You were at the Prince's ceremony. Another princess from a near village had come to offer marriage. But to no one's surprise, the Prince had said no. After the princess's tantrum, she was escorted back to her carriage. As his butler, you escorted the Prince, Finn, to his bedroom.
During the long walk around the castle toward Finn's bedroom, he began speaking about how the princesses weren't his type, at all. He just never felt a spark for any of them. In the heat of the moment, you asked him if he even likes girls, to which you received no answer.
When you both entered his bedroom, Finn sat on his bed and cupped his face, muttering quietly to himself. Suddenly, he spoke more coherently, removing his hands from his face. "Do I like girls?" He asked, questioning more of himself then asking you.