A married man had Reddit captivated this weekend as he live-blogged his discovery that his wife was cheating on him. (We should have seen this one coming after that guy live-tweeted a breakup.)
The whole thread is more than 10,000 words, encompassing the man finding out, hiring a private investigator to tail his wife, and his realization that his sister-in-law is probably cheating, too. We'll give you the highlight reel but it's well worth reading the whole thing.
The husband, who updated for three days straight, first introduced himself and his wife Jenny to the Reddit community:

My wife (Jenny) and I have been married for 8 years. We met when we were 22 and we had both just graduated from university. It’s been great so far, we haven’t had a huge argument where we’ve had to separate for a period of time or anything like that. Also, we have given each other our passwords to our phones and personal emails.
Well, Jenny was sleeping this morning and my brother shot her a text. My brother’s wife (Carly) and Jenny are planning on going out of town for a get-away while my brother, I, and some friends are going to watch football on Sunday and hang out during the weekend. He was asking Jenny to text Carly on his phone because Carly dropped her phone in the toilet. My brother and Carly were basically sharing phones for the time being till she gets a new phone.
I decided to open up the phone and reply something stupid and funny in order to embarrass Jenny. So I opened up the iMessage app and went to read their previous conversation to see what was happening, so I could tell a relevant joke. 2nd to the top of the list of conversations was a chat with a guy/girl named Zack. I didn’t know who Zack was, but the most recent thing he sent her was “<3 gn”. I was curious, so I put off replying to my brother and opened up Jenny and Zack’s chat.
To my horror, there was sexually explicit talk of what he wanted to do to Jenny when she “crawled up next to his sack.” What a filthy beast. I scroll up, and there are multiple nudes from both of them waiting for me to discover. Most of them are dated sometime between 1-4am (usually I’m sleeping then, smart.) so I knew she was obviously trying to hide it from me.
I realized my wife is cheating on me. I took a moment to realize that this was the end of our marriage. All of our happy times, our foreign trips, and our romantic nights must have meant nothing to her. I put the phone down and went to the bathroom to freshen up while Jenny was still sleeping.

Working off recommendations from the Reddit community, the guy hired a divorce attorney and a private investigator to track his cheating missus and his sister-in-law Carly on their "girls" weekend.
As the Redditor expected, his wife met up with Zack at his place -- but Carly met up with someone, too, and they all convened at a hotel.

(4:04pm) 1/17/2015: They have arrived at the hotel. Zack, Jenny, and stranger are heading into the hotel, Carly is inside the hotel somewhere. The stranger is probably the person Carly is having an affair with I'm guessing. If the stranger was a hitman, I'd think he'd be a bit taller or muscular. He looks like an average guy, although he's fairly short. Not sure how the PI can go about following without looking suspicious.
(4:11pm) 1/17/2015: My PI followed them into the lobby, Jenny picked up a room key and all 3 of them headed for the elevator. We're essentially blind right now, we don't know what's going on in the hotel room(s). PI want's to know if he should stakeout the hotel or if we should call it a day? It seems like they'll spend the rest of the day in the hotel and they'll also sleep together there...
(4:16pm) 1/17/2015: Okay, so essentially all four of them are inside the hotel doing something, most likely having sex. The thought of my wife having sex with another man makes me want to puke, but I'm coping. There is no way for my PI to get upstairs in the hotel or to find out what's going on in there. He'll stake out the hotel for a few more hours before heading home.

Things got even more heated when the Redditor told his brother what was going on. The men confronted their wives about the suspected affairs, playing dumb at first, then revealing that they knew everything. The women had some explaining to do:

From what they told me, Jenny had sex, Carly did not but was going to. I don't know what to believe. Jenny again, hugged me and sobbed into my chest, ruining my shirt. Carly cried, but didn't approach her husband.
My brother had a look of relief on his face, but also slight anger. He scolded them about lying for maybe 15 minutes, then again about how badly they had hurt us, and they cried more. I was furious. I thought what we had was great, she never once showed signs of wanting to hook up with other people. I asked her how long this had been going on and how they were meeting each other, but she didn't say anything. After a few more minutes of crying, she said a few weeks, that was the first time they had sex. I was devastated, but I understood that this is what she wanted. Sure, she played with my feelings, but she's not a person fond of commitment at heart. She wants to sleep around, and that's fine with me.
That's just not happening when we're together, so I'm continuing with the divorce process.

Redditors who'd been following the twisty cheating saga all weekend supported the guy's decision, but some questioned the veracity of the story. For those people, the Redditor had a few words: “If you still think it's fake, f*** off, I don't need your s*** when I'm going through this tough time.”
UPDATE: The original post has since been deleted from Reddit. Read the full thread at Thought Catalog.