Truth and Sparta — Camille Oster

Spartans do what they please when it comes to Helot girls and Chara curses the day that Nicias--effectively the enemy of her people--lays eyes on her and decides that he wants her for himself. His attention places her and her family in an impossible position, exasperated by her brother's increasing appetite for rebellion.

Before long, Chara is placed in a position where she needs to make a decision to save her family--no matter the cost, and that includes the building attraction she feels for the Spartan soldier who is the cause of all her problems.