I've been looking at some clips from some reality show in the
US: Cheaters
Basically, it goes like this: some woman thinks that her partner
is cheating, the show collects evidence of the cheating, then they
film the cheated partner catching the cheater in the act and
confronting him.
I don't know whether to feel fascinated at looking at
relationship cheaters getting their comeuppance, or guilty for
watching couples air their dirty linen in public.

Last time Taiwan also got like that one. They film the guy
cheaating with other gals (n vice versa), then they arrange the guy
and the gal (both guy do not know his cheating was caught on film;
gal does not know guy was cheating) to come to the studio, then
showed them the incriminating evidence.
If I remembered correctly, the show was pulled the plug after
3-4 episodes, due to morality issues.