WHAT IS LOVE FOR YOU?!
NOTE: The Pevensies are just related in this way; Lucy and Susan are sisters and Queens of Narnia, Edmund and Peter are brothers and Kings of Archenland after King Lune died and his sons Cor and Corin died too.
Narnia is divided in two; in the south there is Narnia and in the north it's Telmar, conquered now by King Miraz. He has a son named Prune and a nephew named Caspian; both have the title of Prince. He wanted his son to be the King, but the kingdom belonged to his nephew.
BAD NEWS…
"Kill him", demanded the king. "When I die, kill him"
"But, my king, he's your nephew", said Lord Glozelle and Lord Peridian.
"Yes, Father. I couldn't kill my cousin", replied Prune.
"I'm dying, son", said Miraz in a shivering tone; "and I don't want the son of my repulsive brother to be King of Telmar. He'll put Narnia together again and marry beautiful Queen Susan! Would you like that? ... Well, then you have to challenge him, I killed his father in a duel, just kill him. He's an easy prey… Like his father… Understood?" shouted to his son.
"Yes…, Father", said Prince Prune.
"You have to get married, sister!" laughed Queen Lucy with a huge smile.
"Oh, shut up!" answered Susan, "I'll marry someone, but not High King Peter…"
"Why not?" asked little Lu.
"He's so mean and he just cares about his honor and his kingdom and…"
"Marrying you"
"Oh. Come on; I know he cares about me too, but… he just does it because he wants to put Narnia and Archenland together, and then destroy the Calormen and Telmarine kingdom… And I don't want that"
"Oh, yes… Because you like Prince Prune, haha", joked Lucy.
"Haha", laughed Queen Susan. "He's so ugly and his father is mean too. I've go rumors saying he wants to kill his nephew just because he wants his son to be the king!"
"Well, that's something Kings do… It's normal…"
"No, not for me!"
"You want to marry… Prince Caspian then, haha"
"You're so mean", replied her sister. "He's cute and a good person, but if I marry him, telmarines, Talking Beasts and Magical Narnia will be together and Aslan will disapprove that".
"Yes, but he hasn't been here for almost 12 years. You're 26 now and I'm 21, so we can decide by our own. And we'll marry High King Peter and his brother King Edmund", said Lucy.
"You're so crazy!", laughed Susan. "Peter's about four or five years older than me! I don't want an old man! And you neither, Edmund's 24 or 25!"
"Yes, but they're handsome, and…", Lucy turned serious here; "if you don't marry High King Peter, well, you know, He will start a war".
"I know that…" replied Queen Susan.