Alien in the Attic by Celia Kyle

An unexpected inheritance brought Carmen Flores a sprawling mansion—and an even bigger (sexier) secret.

Carmen thought her grandparents left her a house, but instead she finds Arccoo, an alien prince, hiding in the attic. Trapped on Earth, he has no way home until rescue arrives. Except he’s on Earth just long enough for romance to spark between him and Carmen.
When Arccoo leaves for his home planet of Thryal, Carmen decides she’s not ready to let the sinfully seductive alien go. With her sisters’ help, they repair the damage to the ship he left behind and race after the alluring alien.
But Thryal isn’t the paradise they imagined. They are met with suspicion and prejudice from the alien race. Even worse, many are willing to do anything to keep Carmen away from their beloved prince.

They’ve traveled across the stars to find each other, but can their love survive on Thryal? Or are they doomed to burn too brightly until it all goes up in flames?