I also picked up that vibe in @TheCatWithGreenEyes's posts.
Initially I considered the poster is someone who has had someone cheat on her and views the world through that prism.
I'm now beginning to think it may be personal - the amount of venom is almost tangible in the posts.
Is it possible the poster was spurned by the MM in favour of the OW, and this is a bizarre, albeit belated, form of the 'Shoulda Picked Me' dance? (*)
In any event, I agree completely the families of both participants are victims who need not have been publicly humiliated victims but for the actions of others. Others being, principally, the videographer and further by those determined to 'out' the OW to ensure shame, humiliation and bullying are heaped on another set of children.
That's a mindset I find repulsive.
(*) Not a serious consideration, simply an indication to the poster of how vile it is to be subject to completely unfounded interweb nonsense.