The story I'm looking for is Draco/Hermione. Hermione turns out to be Voldemort's daughter, but I can't remember when we find out. There's a sequel to it, and it's really well written. Hermione and Draco fall in love and are together but break up because of Draco's ties to Voldemort. At the end, Hermione is tricked into getting in a car, where she realizes that Draco was there and Voldemort greets her. The sequel starts with her being locked up in Malfoy Manor, escapes, and goes to the Burrow. Draco disguises himself to get into Bill and Fleur's wedding. I forget how some of it goes but what happens is, draco is dragged with them into looking for Horcruxes. The first story is completed while the sequel is still in progress. Thank you for helping ^.^