Is AUTHOR wrong in the post ? POST : First off we need some backstory, I am a quiet kid that usually does not stand up from himself. In my ELA class and Advisory I have a kid in my class that is really just a jerk, not a bully, but not a nice kid. This dude is pretty messed up and does not really do his work in class. We will call him K, because his name starts with K.

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I was reading my book and talking to some people in my advisory class, my advisory teacher is really chill and does not really care if you talk. She then told us that there would be a fire drill in a few minutes, so I put down my book. My eyes were wandering around, waiting for the alarm to blare, but then something caught my eye. I saw K was on his phone looking at a photo of a guy wearing no shirt and having googles on. He then scrolled down a little bit and the dudes butt was on full display.  I looked at his face because I was wondering if this was just something random in his Instagram fee, but K had a full blown smile on his face and liked the picture. He liked the picture, he liked a PORN picture in school! 

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I would have confronted K about it right then, but the fire alarm went off. We went outside for a few minutes then came back, so I decided to confront him there when he was alone (I did not want to embarrass him, you never know, it could have been a meme). I went up to him and asked him why he was looking at porn in school and he denied all claims. I asked him if it was a meme, but he said he did not look at anything inappropriate. I kept on asking questions, but when he did not tell me anything I decided I had to put him on the hotspot, so I decided to ask him in front of his friends. When  K was with his friends he changed his mind and said it was a meme, so I told his friends how he already said it was not a meme. At this point advisory already ended and I had to go walk to my next class, a class I have with a lot of my friends that has a lot of time to walk (PE).

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I saw my friends in the hall, and told them the story. I did not really feel the need to tell them it was gay porn right away, but whenever I found out he had a girlfriend I did. In PE I told all of my friends the story, they already knew K was messed up and a bit weird, but they never thought he would look at porn on his phone IN SCHOOL. I shared the story only to my close friends because I did not want to shame him in front of everyone, even though K makes fun of people in public all the time. But then I got an idea to extract revenge.

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I got the thought of telling his girlfriend that he was watching gay porn in school. I have been thinking it over for the past few days, but I don't know if that would be a horrible thing to do. K is a jerk, but does he deserve possibly loosing his girlfriend? Should I just tell her K was watching porn, and not bring up the gay part? WIBTA?

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TL:DR A bully/jerk looks at gay porn in school, WIBTA if I told his GF?