One time a long time ago, I threatened to call HR. He was so furious that he said he would never speak to me again in I did something like that.
They are both in a supervisory capacity but are not in the exact same department although they work on the same floor. He is over her technically as he is a superintendent and she is a supervisor but she does not report to him.
If you make your spouse that furious, does you marriage really have any chance of making it?
That is the wrong question. A more appropriate question would be "does your marriage have any chance of making it if you continue to help the infidels hide the affair?"
See, by keeping his secret, you are enabling the affair. Affairs thrive on secrecy and your H knows that you will ruin it if you expose him.
Your marriage can survive his temporary anger, it can't survive this affair if you do nothing to stop it.
The most powerful weapon you have against the affair is exposure. Exposure ruins the fantasy, which is like chemotherapy to cancer.
I suspect they have a LOVE NEST together and she is either split up or may still be living with her H. She may be playing the same manipulative, cruel, abusive game your H is playing: announcing he is "separated" and catting around like a single person.
I would find out who this OW is, gather up her husband's and parents name and do a wide spread nuclear exposure on one day. Doing it on one day, in one fell swoop, will have a tsunami effect on the infidels. Expose to Human Resources using a template developed by BritsBrat, a Houston corporate atty. On the same day, call up all your parents, close friends, the OW's husband and parents and expose the affair to them all.
Most importantly, tell your CHILD first so he will be prepared for the fallout. If you don't tell him the truth, your H will tell him lies and spin the truth to him.
Exposure is your very best weapon, RNmom. Turn on the lights in the crack house. The crackheads HATE getting high when everyone is watching!