How would you feel about a somewhat mocking narrator?

I've always loved the idea of an unreliable narrator/one that lies about the true ending of a story, and I'm working on a GOmens fic that follows this sort of theme, and I want the readers to believe one thing about the story, maybe leave hints throughout that all isn't what it seems, then drop the bombshell in the epilogue

The line I have in mind to start the epilogue is sort of mocking, and while I like the idea, I'm worried readers may think *I'm* actually mocking *them*. I planned on noting at the end that it was the narrator, not me, but I don't want to offend anyone either.