Sunder (The Coven #2) - The Coven, #2

The life of a witch is ever changing. After the greatest test the Coven has ever faced, Talis and Dion settle in happily married life. But Talis is the head of the Coven, and his life will never be simple. He has responsibilities far above and beyond what he had anticipated and ever increasing powers to master. With all this, there is the certainty that darkness never sleeps, and now comes a true test of more than just ability, but the strength of his will.
As Teryn and Cian prepare to welcome a new addition to the family, Talis and Dion's work just begins as insecurity and outside forces come together to threaten their marriage. Beneath it all is a sinister force older and more powerful than any ever known, threatening not only to tear them all apart but the world as they know it.