I've written tons of short stories... and one that ended up being short novel-length (around 70 pages?) It was a sci-fi tale of forbidden love. Due to some weird cosmic force, everyone on earth spontaneously disappears... except for this psychic who had premonitions about it, and everyone who was clued into her premonitions. Mostly her daughter (the main character) and her daughter's friends. And also a group of travelers the daughter had met just before the event. The daughter ends up having an affair with one of the travelers... an older married man with a lot to lose.
After a few days, the psychic mother receives another message: the energy of the Earth will soon reverse itself, bringing everyone back as though nothing had happened. This revelation puts the daughter and her love interest into quite a bit of emotional turmoil. She still has very strong feelings for him, but he begins rejecting her out of guilt, out of desire to simply be back to his family. The group all go their separate ways, and wait for the world to return to normal.
As a final twist though, the mother finds out about her daughter's affair with the married traveler, and is able to figure out why it happened: her daughter's newly bloomed 'gift' as a siren. She has an unconscious ability to draw in men, attract them, seduce them, and cause them destruction with no effort. It's not exactly good news.
The story ends with the daughter contacting the man and telling him about the siren factor. She wants to ease the guilt he feels by assuring him that his infidelity was not his fault. Stronger forces made him do it. The story ends on an ambiguous note, with the reader wondering what this man will tell his wife, if anything, about what happened. We also wonder where the main character is going and what she'll do with/about her mysterious gift.