Feud
Yes, Olivia and sister Joan Fontaine never managed to permanently mend their longtime feud, although they tried on occasion, such as the temporary reconciliation in 1962.
Olivia, it seems, couldn't resist needling her sis. One afternoon, over tea, Joan noticed Olivia's TWO Oscars standing on either side of a large bookcase. Joan pointed them out, and Olivia stated, "Yes, I use them as bookends. Joan, dear, what do you use to hold up the other end of YOUR bookcase?"
With that, Joan flounced out of Olivia's house, and the two never spoke again.