Oh no, a marriage may be in jeopardy so what are these people to do?

This is an inconsequential kind of pleasantness.

Oh, the heroine is going to be a successful, independent woman? Kill her mother to drag her back down!

The heroine meets her ex, they talk, and… wait, it’s the happily ever after now?

For this short story to work, with the author’s style and all, the conflict needs to be trivial, even frivolous.