I was in a similar situation to Chloe.
I discovered that my (now ex) husband was having an affair with another serving colleague. At that time, both were senior NCOs & as such were in charge of junior ranks (incl discipline & welfare).
I found out that the affair had been going on for 6 years, since the birth of our youngest child.
I put in service complaints about both of them, and was told that 'due to human rights laws - specifically right to a private life - the services could no longer discipline serving members for having affairs with colleagues (despite this being explicitly given as an example of dishonourable conduct).
We were separated for 6 months following this (even though he split up with her as soon as I found out) & after 6 months I agreed to marriage counselling. We got back together a few months later.
3 years after that, I again discovered he was having an affair - with the same woman.
They were both Warrant Officers at this point (the highest non-commissioned rank). It transpired that they had never actually split up at all, 4 years previously.
I again put in service complaints about their conduct, and also about the misleading nature of the disciplinary code (which still listed extra-marital affairs as against the rules).
I was again dismissed with the 'they have a right to a private life' line.
Sadly, the way Chloe's case has been reported is misleading - Chloe is not getting special treatment, the forces do not give a shit about extramarital affairs anymore - regardless of who is having them.
Chloe's a shit for doing it, but Chloe isn't being treated any different to anyone else in the same situation in this case.