I was also struck by how V's FB had him recall Ashwini's words essentially blaming Sai for Vinu being dead. He recalls this as he realizes that Sai is alive but the kid with Sai isnt Vinu. So essentially he also blames Sai for Vinu dying just like he did blame her for Sam dying and he is angry that Sai survived. So Sai is absolutely proved right in her decision to not go back because-
1. Everyone including V would have blamed her, she would have lost her Savi too in that stress
2. V did move on- no matter what he could say about how it is "namesake" marriage, he did move on.
3. PP is still living there and as maalkin.
V's "guilt" was only as long as Sai was dead, now that she is alive he is upset that she survived.
Not once have V or Ashwini considered that no one would be more shattered than Sai to have lost Vinu. She waited for that child, was heartbroken when she almost lost him to PP, and when she survived but her baby didnt, she would have died a 1000 deaths but she couldnt do anything because she learns she is pregnant. Sai has gone through a lot. and despite that she retains her compassion.....its a miracle.