Well it wasn't as though the Prince could eat very well laying down, or Riku would have let him stay there.
"That will be lovely. There is plenty to celebrate." Galbadia withdrawing, the end of the war, the success of the King. And perhaps, perhaps the engagement of Balamb's Prince, if his father the King would allow it.
Riku wrapped his arms gently about Sora's waist, laying his cheek against the top of his head, his lunch momentarily forgotten. "I will marry you in any season, Sora," he murmured. But Spring seemed appropriate, with how Sora always called Riku his Spring. "Do you think Your Father the King will give his leave soon?"