What story on here can't you stop until you're finished?

I've just finished my fourth go round with Randalynn's "No Obligation" I get sucked into it almost immediately and have to keep reading it until I'm finished. There are some others like that, but this is one I keep going back to and just love it.

Got me wondering what stories others have to read until they finish, no matter how many times they've read it before?

{{Hugs}}

Frank