Master in Shining Armor

The author of Finding Master Right returns to the Master Unleashed series with a new erotic romance with an unexpected surprise.
When Juliet Callahan's company lands a contract to renovate Catacombs, a mysterious private BDSM club, she's intrigued. The club's owner, William Ellis, is a bossy, dominant man who drives her up the wall. To find out what Catacombs needs, Juliet agrees to visit the club, never guessing she'll end up having a torrid night of submitting to Will's dominance.
Will doesn't want a needy submissive he has to treat with kid gloves, but naïve and proper Juliet is too hard to resist. She responds to him beautifully, but after one scorching night, she runs scared. Before he can figure out what makes the interesting girl tick, an unexpected shock shows up on his doorstep.
His ex's baby.