Damn you Malfoy (Draco Malfoy X OC)

Marriage law fic! A story in which the golden trio wasn't just the three of them but had a fourth member. Margot Preston, half blood, Gryffindor to be exact. She's been with the three since their first year and they've saved the day together ever since. Now that the war is over and Voldemort has met his defeat, the fo...