I'm not trying to be rude or anything, but you really should delete this before you get into some serious trouble.
I have reported it in the hopes that Wattpad take it down before it goes beyond them and to the publishers of Fifty Shades of Grey, because if that happens, then you won't just have the risk of getting it taken down, you'll have the risk of being fined a lot of money.
But like I said before, I'm not trying to be rude or anything, just trying to make you understand.
Even though you stated that it didn't belong to you, that doesn't mean you can publish somebody else's copywrited works. You need specific permission to do that and why would you get permission to publish something that lets people read it for free? Because if you could get something for free, why would anyone buy it?