Here are a few:
Love takes time by Brat Summary: Buffy has returned to Sunnydale to bury her mother after having been estranged from her for the past five years. The cause of the problem was her mother's marriage to a certain younger man named Spike. Having to face one another for the first time in five years, Spike and Buffy find that they might need each other more than they realize.
http://spikeluver.com/SpuffyRealm/viewstory.php?sid=23720&warning=NC-17Also this one by Goldilocks at LJ but you need to friend them and they need to friend you back to read it.
Doing it for Daddy Summary - William Pratt and his daughter Buffy spend sixteen years being oblivious to the fact that they have underlying feelings for one another. When dreams have the potential to become reality, maybe something so wrong can turn into something right.
Both are excellent reads!