Hermione remembers the disgusted face she pulled when she first learned about Sirius’ parents after an offhand incest joke at dinner. Only now does she consider how little she actually knew. Orion Black will marry his first cousin Walburga, a strange sort of circumstance that Marion Lestrange could be counted as responsible for. A consequence to a series of fallen dominos, all set off by her mysterious decision to break off the engagement and leave to travel Europe. 