If I remember right it is she who used to call him and not the other way round. After she realised that Shiv is interested in someone else she stopped calling him it is as simple as that.
It is obvious that she kept in touch with him because she has feelings for him and not the other way round.
If Ashima calls him up now it will be foolish on her part considering the fact that she saw him as something more than a friend and for him she was just some friend like anyone.
How often do we call up friends whom we have been to college with even if we had been close friends back then?
As years go by friendships from youth recede into background it happens in real life too.
Whenrecent child trafficking track happened Shiv explained why he was not in touch with an IAS friend of his. Life happens ppl lose touch with friends when they meet again it's good but out of sight they will be pushed back into mind.
I don't see what is so abnormal if Shiv doesn't call her
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People like DB are even more dangerous than Heth Singh simply because they are family and what they do is even more dangerous.
Daddu is not a great head of the family so was Dsa a good head of the family?
Dsa bullies her family into obeying her are the results any good?
Dsa was rude with her sister was that a right thing?
It takes all kinds of people to make up this world.
They are just presenting two contrasting situations here. Anandi and Shiv can handle Heth Singhs of the world very easily and not DB.