Starlight Star Bright (The Men of Dragons' House #1)
H.M. Wolfe, E.L. Nelson

Alasdair Stark is as happy as he can be, having Ardan's endless love. The trust and affection of his husband's son Lorcan and a stable career and professional reputation in spite of his very young age. Everything is perfect, until the fateful day Ardan's past literally appears on their doorstep, threatening to destroy the harmony of their life.
As even more secrets are unearthed, Alasdair has to make some decisions that could alter more than one life. Is he ready to take the step and pay the price? And, when what he holds dearest, and nearest is threatened, what path will Ardan choose? Will, the love between the two men, stand the new trials, or will it go away?