"Please forgive this intrusion, Mrs. Weasley," Narcissa said quietly to Molly as she brushed soot disdainfully from her dress.  "Lucius wanted to come himself but given the circumstances between our families we thought it would be better if it was me."  Molly nodded silently.  Hermione ran to Narcissa and embraced her, clinging hard to her mistress for a long moment.  Narcissa returned it.