Zelda was at Hyrule Castle, inside of the main hall her with the king and queen, her mother and father. Speaking of Link's heroic defeat of Gannondorf is what Link speculated. Link was halfway across the room before anyone noticed him. Zelda and her parents were all at one end of a massive dinner table that stretched the length of the great main hall. Zelda looked up and saw Link, and almost instantly joy lit her face and smile stretched on her face.
However, Zelda's smile was quickly washed away when she noticed that Link had his sword held in firmly in his right hand. By now her parents had noticed Link, but they too were alarmed. The sword being drawn from its holster, though, was not what scared any of them at this point. It was the evil, almost demonic grin Link had, that startled them.
Zelda, very scared, not because she could have ever predicted what was going to come next, but because she feared perhaps Gannondorf wasn't locked away in the Seal of Time. But that didn't make much sense, why would Link be smiling? No, it was the fear of the unknown that scared her. She had no idea what Link was thinking, she had no clue what was about to happen to her, and her family.
Zelda, suddenly, began to fear terribly what was about happen, for the very reason that she did not know what was going to happen. She quickly recalled, as a child she remembered disobeying her father. Her father was quite scary when he got mad at her. Her memories of her father screaming at her, and punishing her were really a lot worse than what actually happened. Her father did raise his voice quite loudly, but that was all he ever did that one could say is irresponsible. His punishments were fair. The worst memory she ever had was when her father had been particularly upset, and slammed the door of her room open, making a loud bang from the wooden door hitting against the stone walls. It was the fear of awaiting an unknown punishment that scared her, and in turn made the punishment in and of its self seem much worse than it actually was, because she had auto suggested to herself that it would be horrible.
That was the fear she felt now, looking at Link. She feared the unknown. She knew something horrific was about to take place, and she knew it would be awful, but she didn't know what. When her father finally ripped the door open to her room, making a gargantuan loud bang when the wood cracked against the stone of the castle walls, he stopped himself, and turned around and walked away, mostly because her mother was almost begging for him to stop, afraid that he might doing something he would regret. But just because of the intense fear of the unknown she had felt, unknowing what punishment her father would carry out, only knowing it would be terrible, that loud sound of the wooden door hitting hard against the stone deeply scarred her.
That was what was what she felt looking at Link now, almost as strong as she had ever felt it before, and it was in part because she loved Link. It wasn't necessarily a husband and wife love, but it could have been. Nevertheless, she had always had a special place in her heart for him ever since she had met him. Link could have turned around and left the room, and it would still have scared her a little bit, because that was the way Zelda's mind worked. But Link didn't turn around and leave the room, and he didn't slam a door. What he was about to do was considerably worse. Finally, after a long, uncomfortable silence, he paced over to Zelda, wrapped the fingers on his left hand firmly around her neck and firmly threw her towards the ground.