Trina -
You cannot generalize the situation .
Imagine a young man of 30 - his father has just died , his mother is a cancer patient and needs his time and financial help .
He has his wife and a kid .
But at this point of time who needs him more , what should be this mans first priority?
So priority in ones life always depend on the situation , time and circumstances.
Coming to ASR...
ASR does not know Anjali is meeting Shyam . Arnav thinks Anjali is heartbroken and pregnant who needs both emotional and physical care . So at this moment he should be allowed to think that Anjali is more important than Khushi .
Khushi, fortunately is more reasonable and will support Arnav in his attempts to ensure Anjali's well-being .
I havent seen the episode, do not know what arnav has said.