Kazzon’s Human Bride by Sue Lyndon

He was promised a human bride — and he wants her.

Desperate to escape an arranged marriage to a Tarrkuan, Caylee trades places with another human female who actually wants to leave Earth and marry one of the fearsome aliens.
She thinks she’s safe, she thinks she’s in the clear… until a huge Tarrkuan diplomat named Kazzon discovers her deception and takes her into custody.
Now she’s a prisoner of the very aliens from whom she was trying to hide.
And that alien who captured her?
He’s been promised a human bride — and he plans to marry her.