Deep Sea Kiss by Zoe Ashwood

Lottie moved to Norway for the scenery and her work as a nurse. Fast forward a couple of years, and she’s hunting down her baby twins’ father and cursing the man for disappearing on her. Until the moment his brother informs her of his death. And the fact that her babies might actually be part-mythological creatures.
Eiric’s search for his brother’s killer is derailed when Lottie pops up on his doorstep, claiming his brother knocked her up. Now he has to explain that his entire family is different, to say the least. Non-human, to be exact. As much as he resists, Lottie’s easy charm and sunny attitude set his blood boiling.
But danger looms over their fledgling family, and the twins have to be protected at all costs. Lottie needs to trust Eiric and his family of sea dragons to keep her babies safe, even though the price might be her heart.