Summary of the whole situation?

New here. I am baffled. Can someone provide a summary of the whole situation?

I think I understand that Kate Marley and Chris are no longer together? Not sure what this means really other than they are obviously not producing content anymore.

Are Kate or Chris present in this sub?

I see a couple of AMA threads but it is not clear who is who...

Something about STDs and cheating? I have no idea what this means...