Oh, I disagree, Intrepid. It's obvious the boss and employee/lover are in collusion, and this person (male/female? who knows!) asserted themself, it would be game over for this poster.
I think the smart thing to do is wait a bit and suss things out... maybe the relationship will peter out, or this cination person will find another way to deal with it.
If nothing is happening to the employees who were complained about, I'd leave it alone. Cination is too new to make waves on an unknown ocean. Watch and see, then eventually make your move. Even if the person was innocent, what will that help if Cination does anything? Employee and boss are in collusion. Won't listen.
If there's a chance to go above the boss, that's another issue, but it didn't sound like it.
More info needed.