The reason why Santu does not want to confide her major
areas of tyaag and sacrifice to DM is that obviously DM
will stop her from such acts that put her to misery/pain,
or acts that are more of a punishment of her just because
of his family members - like in the case where she wanted
the operation, and also accepting blame/prison sentence..
he had an extremely high opinion and feelings for her -
shown at the time when he took away Subhi's frame and
replaced it with Santu's and gave long talk on motherhood -
he knows deep down this dufford is suffering........ I just
wish he went into detective mode to find the Arjan truth
and claim the love of his life once and for all..........
He is hurt and cannot bear anymore where with all her love/life
for him, she puts others' needs before their relationship.......