Has this changed, or did the PC crowd change it?
It was acceptable outside the chain of command. An officer and enlisted could have a relationship if they were in another brigade, for example. There were even married couples with families that were officer and NCO. Perfectly healthy relationship, right?
The military these days says that a married couple with an officer and NCO is an abomination. So what's that say about all the married couples over the decades that were officers and NCOs? Military policies these days about this sort of thing are disgraceful.