Guess I'll start the ball rolling:

#1 What We Saw by Aaron Hartzler

Quote
Kate Weston can piece together most of the bash at John Doone’s house: shots with Stacey Stallard, Ben Cody taking her keys and getting her home early—the feeling that maybe he’s becoming more than just the guy she’s known since they were kids.

But when a picture of Stacey passed out over Deacon Mills’s shoulder appears online the next morning, Kate suspects she doesn’t have all the details.

#2 A Beautiful Terrible Thing: A Memoir of Marriage and Betrayal by Jen Waite

A woman learns that her husband isn't who she thought he was.

It's a sad story but...in the telling it comes off weak. She suspects her husband is having an affair. Instead of doing some research, she immediately loses it and and screams at him. Yeah, he was a jerk. But her behavior came off as immature too. From reading the internet, she decides he was a sociopath. And her therapist agrees with this diagnosis, never having met the man?