Link: https://old.reddit.com/r/BestofRedditorUpdates/comments/1vn03vj/i_know_my_sisters_23f_boyfriend_25m_is_cheating/

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The original was posted on /r/bestofredditorupdates by /u/Direct-Caterpillar77 on 2026-08-13 04:02:02+00:00.

I am not The OOP, OOP is u/Domandc

I know my sisters [23F] boyfriend [25M] is cheating on her, I have proof. But he is threatening to tell her I broke something of hers that he paid to replace.

Original Post  June 6, 2016

Hi everyone, so I have never used Reddit before. I am 15 and I live in Pennsylvania with my sister. I technically am suppose to be living with my mom but she is always away on business. I live with my sister 40 weeks out of the year

A while back I tripped over the step and I knocked the table. Unfortunately for me she had a flower vase on the table and it fell and shattered. I was freaking out because it looked really expensive and I thought she will kill me.

It was stupid but I tried to fix it with super glue, I know again stupid but I was panicking. Her boyfriend came home and he saw what had happened. He told me to calm down we will just go get another one. She got it from this online store and he ordered the exact same one from online. It cost $150. He told me once I get a job I have to pay him back the money

2 weeks ago I went to go use the computer and he was still logged into his Facebook. You know how when you get a message on Facebook it pops up on your screen. Thats what had happened, but it has been there for a while if that makes sense. I read the message this woman sent and it said something about giving him a blowjob.

I read through the messages and it was basically sexting, sending nudes and there was even times to meet up. I took photos on the conversation with my cell phone. The more I started think about it, the more I was put off telling my sister. I thought that I really had no proof he slept with her and I was not sure if this was cheating or not. It wasn't physically as far as I knew at the time, to my understanding cheating is when you have sex with someone.

3 nights ago I came home and I walked in on my sisters boyfriend making out with the same lady from Facebook. I arrived home earlier then I should have and he kinda freaked out. He told me not to tell my sister because I owed him one.

He told me I still owed him money from the broken vase and my sister would be pissed at me for breaking it in the first place. He is not here at the moment. I am upstairs in my room and my sister is downstairs with her friend. I don't know what to do

tl;dr: I have proof my sisters boyfriend is cheating on her. He told me not to tell her because I owe him money for the vase I broke and he will tell my sister I broke the vase

TOP COMMENTS

AwkwardBurritoChick

$150 vase is nothing compared to knowing that your boyfriend is cheating on you.  Also let her know he's trying to blackmail you.  This guy is a douche.

~

Trombone-a-thon

Hey, you won't have to pay him back when you tell your sister and she dumps his ass!

Update  June 6, 2016 (Same Day)

Thank you.

I told my sister and showed her the proof the short version of events is, she could care less about the vase. She was more upset about the blackmailing and cheating then anything. She rents her place, he just lives here like me. She texted him and told him not to bother coming home, if he comes she will call the cops

THIS IS A REPOST SUB - I AM NOT THE OOP

DO NOT CONTACT THE OOP's OR COMMENT ON LINKED POSTS, REMEMBER - RULE 7

Nice ending