You're too fucking stupid to waste time debating this point.
Look, if a subordinate could prove that they filed multiple complaints against a supervisor for unwanted advances and the company did nothing - Then yes, there could be grounds for a lawsuit against the company by that subordinate.
But a consensual relationship between employees? Any judge would reject that faster than you can whine (about everything).
But agreed - I have better things on Christmas than argue with idiots on the Internet