I was reading some fics in FFN and I read a one-shot story that looks a lot Grace with Malfoys from romulus lupim. It's posted here:

http://www.fanfiction.net/s/4998749/1/Thanks_to_the_Malfoys.

The title, I suppose, it's the same and both stories are too similar, but in FFN Hermione is married with Harry (and they decided to stay married, living in Australia with her parents).

Does romulus lupim post in FFN too?

I forget to add: the author is broomstick flyer.

Oh, this isn't plagiarism. Romulus Lupin (Gil) borrowed the plot from broomstick flyer. He (R L) said so on his author note.

This story was inspired by the short story “Thanks to the Malfoys” by the wonderful writing team broomstick flyer on fanfiction.net. ...

... it let loose a rabid, zealous and somewhat violent plot bunny which wouldn't let me go. So I asked permission from broomstick flyer to take their basic idea and run with it, which they graciously consented to.

Gil's one of the most trustworthy guys in the fandom. Thanks for asking all the same nonetheless.

That's why I asked if RL post in another site before jump conclusions.

Yep, I know that's your intention. Turns out broomstick flyer did write that plot first and Gil/romulus borrowed it from them. I doubt Gil's ever uploaded stories in ffn. He also posts stories in Fiction Alley.org (Schnoogle, Astronomy Tower, etc) as well.