Kili wasn't entirely sure how it happened. One moment, Thorin brought up marriage and the next Kili was standing at the alter waiting for a woman he hadn't even met yet.

After the ceremony, he went up to his room. The princess would meet him there soon so they could 'consummate the marriage', Kili wasn't even sure what her name was yet and he already had to sleep with her?

He was confused more than anything, why did he have to be married off and not his brother? What kind of logic is that?