The umpteenth post on Pudding’s character
Shipping or not, it was intentional for Oda to make Sanji and Nami smile at each other: so that Pudding would react to it, and in that way. Sanji asked her just a few chapters ago if one the person she’s been lying to all her life wasn’t herself.
Of course the answer is yes, but in which ways? Could Pudding have been lying to herself by being wicked? I don’t think so; she wouldn’t go as far as stabbing children. Could it involve her true wishes for her life? Yes. I definitely think so.
Lying or not, some of the truth slipped through what she said. And I think it was her admiration for Lola, her courage in following her wishes. There’s a ton of evil characters who do follow their wishes, being evil doesn’t mean in op that you don’t have a soul or a character altogether.
And now seeing how her own act was dismantle by Sanji and how he has used it to make his own happiness, represented by the smile he shares with Nami - and so idealistically with all the crew -, she’s upset and faces her own reality where she is acting too, but is not, andshe has just realized now, will never be, happy.
Other than that, they’re fricking smiling at each other. Usually Nami would be fricking scared, like she is later along with Chopper, but here she simply seems happy. It may also not be false that Pudding fantasizes about marriage
… she’s always known that she was nothing more than a doll to her mother, and a monster to all other people. She’s also always known she would never be able to marry whom she wanted, both because she must serve a purpose first, and secondly, because who would think her third eyes “to be beautiful”?
At this point she may even have a true crush on Sanji. He saw her an honest man, someone she’s never knew and never had respect for. And even though a part of her is definitely naturally wicked, she can’t help seeing what being good brings. He was the first to compliment her on her eye - and though he was acting, I don’t think he was lying. And now she sees him “elope” with another woman, carrying her chivalrously in her arms. Something she’s learned to despise but that she may, after all, long for, in one word “love”, not political opportunism.