Yep; it was one of Astolat's, and I know you've read hers, so it's probably the one you're thinking of. ^_^

If there is one story that I want to point to as "Yes, THOSE are John's parents and THAT is his relationship with them!" that's the story. Of course, now we have a better understanding of what the story actually is, but it's not too far off from that.