Naren is the father of Pooja, I assume? Pooja is the product of his affair which Veena doesn’t know about but Nishi and YK know about? And Rohit knows about it too hence his anger towards his dad.
The way YK said the blood was arranged for Pooja seemed a bit contrived. Veena’s comment to Naren that he looked tired, could it mean that he was tired as he had just donated blood to Pooja?