Family are unaware of its spreading ruling class ideology.
Instead, proletariat family offers a safe haven from the
harsh and exploitative world of capitalism outside in which
workers can be private and be themselves.
Eg. the family go on holidays
together and give emotional support.
But this is only an illusion. Capitalism still benefits
from private activities of the family. For example,
family holidays ensure that even when workers are on
a break, the bourgeoisie still profit from high
expenses of the holiday.