Seafire Dragon by Natalie Kristen

Piper Wylde promised her best friend that she would always look after her little boy, Zander. She is determined to give Zander a safe, stable family life, something she has never experienced but has always yearned for.
As a graduate from the school of hard knocks, Piper has given up hope of ever meeting her prince charming. She just wants to be the best mom to her adopted son.

Seath Fireblood is proud of the success that he and his two elder brothers have achieved in Shadow Point. Their landscaping business is booming, and their lives are happy and settled.
When Seath shows up at the doorstep of the newest resident of Shadow Point, his dragon stirs for the first time in his life. His dragon knows that this beautiful human is his.

But someone wants Piper and Zander as well.
Someone who wants Seath completely and utterly destroyed…