Embraced by Darkness — Kaitlyn O'Connor

“Oh my god, Damien! We'll be in such trouble if we're caught here! What were you thinking?”
He tilted his head to one side, narrowing his eyes. “I was thinking that this would be the perfect place to mate. I was thinking I would carry you far away from anyone who might interfere and I would make you mine. The plan was to redeem my promise of before -- to plant my seed in your belly and watch it grow.

Captain Cheyenne Mortensen wasn't particularly happy about being chosen to lead a peace mission to Nardyl, but she was a soldier. She did as she was ordered.
And she wasn't really surprised when they were immediately imprisoned upon arrival.
The Saitrens weren't friends of humans.
She was surprised that one of their warriors, Damien, seemed to take an instant fancy to her.
And she wasn't certain whether to be deeply alarmed or deeply thrilled when he rescued her from the tower where she'd been imprisoned.
But she was sure that nothing was going quite as she'd expected and that rescue/capture by Damien was complicating an already difficult mission.

Two short excerpts from book one and book two included at the end of the book.