" Why are you talking about Milo and me as if I weren’t here?” I asked angrily. “What are you afraid will happen between us? Half the Argonauts believe it already did, but that doesn’t make it so.”
“Not yet,” Castor said. “People change, especially on a long voyage.”
“Why does this matter so much to you?”
“Because now, Helen, you can have a child,” Polydeuces replied. He lifted my chin gently. “You are the next ruler of Sparta. The man you marry will be Sparta’s king, and your children will rule our land after you. If you have a baby now, that child could grow up to challenge your other children for the throne. Sparta’s enemies would be only too happy to help that child raise an army, then swoop down on our lands in the wake of the war and devour anything that remains. When you’re dead, do you want to leave your people peace or chaos?”
I didn’t have to give him an answer. We both knew it.
“Now, Polydeuces, let her be,” Castor said, hugging me again. “Look at that face! Her brow’s all creased with worry, and for nothing. As if our little sister would ever give her heart to anyone less than a prince! As if a slave’s child could ever raise an army to take Sparta!”
I whirled out from under Castor’s arm. “Milo is no slave, and he’s worth ten princes!”
Castor sucked in his breath sharply and looked to Polydeuces. “All right, now I’m worried,” he said.
“Either you trust me or you don’t,” I said. “That’s your only worry. I’ve made my decision. I’m going to the waterfront, I’m praying to Poseidon that I’ll find the ship I need, and I’m going home. As a boy. With Milo.”
My brothers smiled. “It’s good to see you so confident again.” Polydeuces said. “But not too confident to reject some help from your devoted brothers?”
I threw my arms around their necks. “Never. "

― Esther M. Friesner , Nobody's Prize (Nobody's Princess, #2)