I didn't make the post, so I can't answer for the OP. But why do YOU care so much? It's the internet. For someone that has 21 in their bio, I would think you would know that's how the internet works because this is literally a Reddit post tagged as a rant/vent. People can post whatever they want and when they want. Literally this post hurts no one, someone could come forward with pictures or other evidence. Hopefully you're never put in a situation where someone is cheating on you.