Happiness
I read some reviews before watching this and i thought people were exaggerating by calling this a horror but no, the way cheating is depicted as if it's nothing is absolutely chilling. Incredible subversion of the "perfect family" trope, the movie keeps the peaceful atmosphere it started with because it's his point of view, he's carefree about the cheating as long as he's happy, but we see him as who he really is: a narcissist willingly ignoring the hurt he's causing. Brilliant, pissed me the fuck off