What are some examples of how Rukmani and Nathan put aside their traditions or Hindu beliefs in order to survive and preserve their culture?

in many ways rukmani and nathan put aside their traditions
n hindu beliefs.... first of all its a sin in hindu tradition to touch cow skin but two
sons from their family do the work of tanning in the family................ their
daughter does the work which is not acceptable in any society still the parents accept
it even they accept her child because she brings money at the time of crisis they
neglect the illegitimate source of her income......rukmani even accepts the physical
relationship of her husband with a neighbour woman kunthi..... her sons go ceylon by sea
route which was again a sin in the hindu religion to cross the sea......at the end they
leave their village their native place n move to town...... all these wre against the
traditions and beleifs of the contemporary society