Falling for the Masked Omega by Jena Wade

When a shy omega dragon gets invited to a masked ball, Nym tells himself he’s just going for the experience.

One night of magic. One night to forget how lonely he’s been.
But then he meets him—the wolf who smells like safety and sin all at once. Their connection is instant. Intense. It’s fate.
They promise nothing but the night… and yet, somehow, it feels like forever.
Until morning comes and Dain is gone.
Nym convinces himself it was just a fantasy and disappears before his heart can break any further. But months later, fantasy becomes reality when two pink lines change everything. Pregnant and desperate for stability, Nym seeks out the father he’s never known—a powerful dragon with a mansion full of secrets and staff.

Including one very familiar wolf.

Now Dain is standing in front of him again, claiming that they were fated all along.But Nym’s keeping more than just his identity hidden… and Dain’s not the kind of alpha to walk away a second time.