Alpha and Omega

I'm looking for a book like this, where the alpha can sense that the omega is pregnant even before she knows it. Maybe it's just an instinctive feeling, maybe the alpha really knows, but he takes advantage of the few days before the omega realizes.

Noticing the slight change in her scent, the slight creaminess, a subtle tone that persists even during rain and baths. How the omega begins to sleep a little more, shyly explaining that she feels more tired, that her nest feels more like home.

The rosiness on her cheeks, always present, but somehow /more/ now. The way the omega's nesting behavior seems to increase, grabbing clothes and blankets and gently begging for the alpha's scent against all odds. The silent whispers whenever the alpha's hand rests on her belly,"