Tal-Amun by Vivienne Savage

Exarch Tal-Amun is royalty among the Lexar, a race of giant, genetically superior humans charged with protecting the universe. When another alien species attacks an unauthorized human research base, the alien commander goes down personally to rescue the survivors.With them comes a human researcher with the body of a goddess and the stubborn soul of a female Lexar. She’s the woman he’s spent his entire life searching for, and earning her trust won’t be easy.