Why do you think that it struck Félicité as wrong that Mme. Aubain should die before she did?

When Mme. Aubain dies, Félicité feels that it is out of the proper order of things for a master to die before their servant. This is interesting because if the servant died first, then the master would be without care. In that sense it seems like the proper order. Perhaps, however, Félicité feels that, as a servant and caregiver to Mme. Aubain, she is a kind of mother to her. In this sense then, Mme. Aubain's death is like the death of a child to Félicité. It is interesting to observe that, although Félicité doesn't have any real children of her own, she is a mother-figure to several, all of whom die before she does.