Once the king approached him, Loki, even while he wasn't making any eye contact, instinctively closed his eyes, and held the wine chalice so tightly that his knuckles may/may not turn white. [i]'You screw up, a beating will be in order'[/i], that was the policy. That's what he heard -- and experienced. However, when in the presence of the king, it was a guarantee. The Jotun's breathing picked up speed, fearing for the worst yet [i]knowing[/i] that the worst was coming. 

Because he had his eyes closed, Loki didn't notice Silena watching with an observant eye, while trying to come up with an answer, in the hope to spare himself from getting backhanded. He had never received punishment, in front of people, since Thor never acted on them, in these settings. While it has never happened, doesn't mean it will never occur. A majority of what he had to endure, was away from the prying eyes of the king's subjects, including the queen and princess. To top it off, Thor made him swear not to tell, or the abuse will get worse. 

With the memories coming back, full-circle, tears pried at the corner of his closed eyes, and his lower lip slightly trembled, along with the rest of his body. In the middle of brewing up some level of defense, the voice of Silena cut into their breathing space. Loki still didn't open his eyes, and subconsciously brought the wine chalice closer to his body. He wanted to shrink down, physically, but could only do so mentally. 

"Throw this piece of Jotun filth into the cage", Thor said, completely ignoring his daughter's words. "He shall never see the light of day, until [i]I[/i] am through with him", he added, before turning back to the collapsed figure of his wife, but not until giving Loki a glare. It was unreadable, but nothing good resonated from it, either.