The dude made the killer move, don't tell her right away, and use those 3 days to move out without dealing with her drama. The bigger freakout as she gets back is just the cherry on top.
stories like that are their own meme these days, so I would take it with a grain of salt. otoh this is reddit and modern women are fucking retarded, so who knows...
was about to post the most famous one but can't find it in the depths of my folders. same setup, girl going on vacation, asks if it's ok to just fuck around without feelings "in the heat of the moment", dude says "if that's what you want".
fast forward some time later, vacation sucks, chick didn't find anyone to bone, then gets an email from old lady neighbor letting her know boyfriend is hooking up with a coworker and porking her every night in their bed.
or another one where the chick has a "boring" boyfriend who doesn't really do much and stays mostly at home. all good but chick wants "more". they split, her new life sucks, then it turns out dude was loaded. cope and seething ensues.
this one is a bit too out there and reads more like copefiction
however, found something else. it's fake but it's just too perfect given what's going on:
