What does Winston remember about why his mother and sister died? (Or about the last time he sees them.)

does
not actually know what happened to his
mother and sister after they left home when he was a boy,
and he never saw
them again. He had made things impossible for the two of them by constantly

bullying them, demanding increasing portions of the little food available and taking
his
sister's portions from her. The fact that he, in effect, forced them to
abandon him haunts
Winston. His dreamlike memories of them are thus permeated
by his feelings of guilt. One scene
in particular that he remembers is a
bittersweet one of a single day when his mother bought a
game for them, a set
of snakes and ladders, and all three of them were for once happy as they

played it...