And Omega Makes Four by Aria Grace

Three alphas were on the run, the only survivors of their pack and out in the world alone. Just trying to stay together and alive.
Never staying in one place for more than a few days at a time.
And definitely not looking for an omega to tag along.
But when a small wolf escapes a forced betrothal, he finds himself right in the middle of an even tenser environment.
Not because he wasn’t interested in the three alphas individually but because he didn’t know it was possible for them to all build a family together.