Riches to Rags by Casey L. Bond

Most girls dream of being princesses, but one princess just wants to be a normal girl.

Ella Carina, crown princess of Aelawyn, knows brutality and lies—she’s seen the way her father rules. Princess. Possession. To her father, the words had the same meaning. She was only as valuable as the alliance formed with her betrothal. Her freedom comes from an unlikely place: an attack on the castle.
When the conquering King offers to protect her from the betrothal her father arranged for political gain, she consents. Hiding her within a peasant family is the only way to keep her and her secret safe.

In this simpler life, Ella flourishes and catches the eye of the local Blacksmith’s son. For once, she can be herself and make her own choices, but the life of a princess—even one kept secret—was never meant to be easy.
Trevor, crown prince of Galder has been searching for Ella, but not because of their betrothal. She is in grave danger from the very people who hid her away. His plan is to show her the truth and help her to safety.

Nothing goes as planned. When Trevor finds her, it’s to discover she’s fallen in love with a peasant. Now he has two goals: help her regain her throne… and show her that she belongs with him.