Most companies I’m involved with just order the separation of the two to prevent supervisor-employee conflict. Firings don’t occur even in reality.
I don’t see any merit of illegality based on age difference. Again, the guy is ‘legal’ because he’s 18 = at or above the age of consent.
You must work in a low class parallel universe..
I've personally fired adult managers, having affairs with adult employees who reported directly to them.... It had nothing to do with age or marital status - it had everything to do with maintaining the integrity of the Manager/Employee relationship.
This occurs frequently in businesses that take Management and Personnel responsibilities seriously.....