Harry Potter and the Sorcerer’s Stone as told by Mary GrandPré
Looking for a (possibly incomplete) fic! H and D work at Hogwarts together and they start dating. She's technically still married to Ron, but they're over. D gives her magic earrings and when she spends Xmas with the Weasleys he thinks that she's getting back with Ron, but she really was just trying to make their separation easier- because of this misunderstanding D breaks up with H. The last thing I remember was that H was pregnant with D's baby, but didn't tell him. Thanks so much!