Alphas and Their Nanny (en Inglés) - Monroe K Noah

Aria Collins needed a job. What she got was a cold, brooding billionaire Alpha, his quietly perceptive five-year-old son, and a bond she never asked for.
From the moment she steps out of his elevator and into the glass-and-marble silence of Damien Blackwood's penthouse, something shifts. Not for her, not at first. But for him, the man who built his entire life around control, around walls, around the quiet certainty that fated mates were a weakness dressed up as destiny.
He knows what she is to him. He decides it does not matter.
But Damien's world is not only penthouse coffee and careful distance. When Caden Voss, dangerous and deliberately charming, sets his attention on Aria, the walls Damien built so carefully begin to mean something different. Not a prison for himself. A line he will not let anyone cross.
Alphas and Their Nanny is a slow burn paranormal romance about a man learning that strength and surrender are not opposites, a woman choosing on her own terms, and a little boy who figures the whole thing out long before either of them does. It is warm, it is tense, and it earns every moment of its ending.