Funny (not ha ha) story, an online friend I played wow with said he was in a bad mood one day because he was having issues with his wife, so he just wanted to play solo for a bit. After getting him to open up and vent a bit (a guy I'd never met in real life, and the first I'd even heard that he was married), 5 minutes later I said "Dude, don't take this the wrong way, but it sounds like she's having an affair."
My reasoning after that short amount of time? She was getting pissed at him for working late at HIS business (meaning he was comfortably wealthy) and not making time for her, so one day, he decided to surprise her and come home early to take her out, and she got pissed at him for that too. So the thought that pops into my head is "she had plans with some other guy that my friend just interrupted".
Couple of days later my friend comes online and said I was right. He hadn't even suspected a thing til I said it. :-(
tl:dr ~ I figured out my friend's wife was cheating on him because she behaved exactly as this meme depicts.