Essential Master (Doms of Napa Valley #2)
Dakota Trace

New members, Dom Nicholaus Tarquinio and switch Stephanie McKeown have a unique D/s relationship and have been searching for sometime for a third member, a submissive to complete their triad. But the trick is to find a man who not only appeals to Nicholaus's domination but isn't above allowing Stephanie to have her fun too.
When Zebadiah catches Stephanie's eye, she and Nicholaus approach the wounded sub, wondering if he's truly ready take what they have to offer him, or is Ethan right about Zebahiah not being ready? Only time will tell.