Instead he tells her what Rana told him a few minutes ago, what Rana couldn't bear to tell his sister, over the telephone, himself: that her father died yesterday evening, of a heart attack, playing patience on his bed. (2.96)
There is a certain reserve, even between family members, that makes it difficult for Rana, Ashima's brother, to tell Ashima that her father has died. Only Ashoke is able to do so, because he and Ashima are so close.
Being rescued from that shattered train had been the first miracle of his life. But here, now, reposing in his arms, weighing next to nothing but changing everything, is the second. (2.15)
Ashoke is delighted with the birth of his son, which he associates with his miraculous rescue from a train wreck. For Ashoke, family will continue to be a source of happiness, no matter how much Gogol tries to muck it up in the future.