The dinner the prince had originally intended as a way to ease the atmosphere ended up giving him a stomachache out of pure frustration at Rhaenys, causing him to storm off in a huff.
Ghost was full of regret herself. She had tried her best to convey that she had no intention of interfering with Prince Rhaegar, and that she would happily play the part of a mere trophy wife and a mascot—leaving him completely free to love whoever he wished.
The prince had wanted to smooth things over with her, and she had utterly ruined it.
Chapter 50