He gave one last look at her window, which was closed shut, then took a deep breath.
"Trystane" his sister called him again, "go now"
The young Prince turned his head around and nodded, knowing that Myrcella wasn't going to say goodbye to him and it was useless to hope for her to show up at the window.
"Come on" Arianne insisted, taking his arm and gently pushing him towards the horse, "get up"
"I don't understand" he said as he obeyed, "what will I be doing in King's Landing"
"I told you, and Father did as well" she huffed, annoyed, "you will see King Tommen and Queen Margaery on their wedding day, and wish them well for all Dorne"
"I meant why me" replied Trystane.
"You are a Dornish Prince"
"Father is a Dornish Prince, Quentyn is a Dornish Prince"
"Father's legs hurt too bad" observed Arianne, raising an eyebrow.
"So what? He won't be going to King's Landing on foot.."
"Trystane!" she exclaimed, crossing her arms. "I cannot believe you are that selfish!"
"I'm not, I'm.." Trystane sighed, "I just don't want to go to King's Landing, not now.. not without her"
"Well, the royal marriage will be in a few days, and Myrcella is sick, she can't travel now"
"Quentyn.."
"The Gods know when he will be home again" hissed Arianne, rolling her eyes, "he can't go, and neither do Father and Myrcella"
"What about you?"
"Me?" she echoed, surprised. "What do you mean me?"
"Well, I thought it was clear that by you I meant you" Trystane joked, "perhaps I could draw you a.."
"Oh, shut up" hissed Arianne, "I know what you meant to say, but I can't go!"
"Why not? You're a Dornish Princess, you can represent the kingdom as you wish Myrcella's brother well"
"Trys, I can't go" she slowly repeated, giving him a serious look.
The young Prince wrinkled his nose, wanting to reply, but knowing how usless it would have been he simply kept quiet.
"You won't be away for long" his sister assured him, "you'll be back home soon enough. And we'll take good care of Myrcella, you know that"
"Yes, I know that" he said in a low voice, "I just feel bad about going to her house without her"
"She will be fine again, but she need to stay here. Besides, Sunspear is her house now"
I just wish she knew that too, thought Trystane, but he remained silent.
"Come on, little brother" Arianne gave him one of her beautiful smiles, "go, and be back soon. Your princess will be waiting for you, and so will I. And Father as well"
"Tell Myrcella to write to me while I'm gone" Trystane said as he made his horse turn around, "or to her mother, that'll be good as well. I just want to know when she feels better"
"You will know, Trys, I promise" his sister nodded, than looked at the Dornish knights who were supposed to escort the young Prince to King's Landing. "Take care of my brother, all of you"
"Aye, Princess" they replied at the same time, then they started to ride.
"Come, my Prince" one of them said.
Arianne waved her hand, and, after one useless last look at Myrcella's window, Trystane rode off.