I am not sure about Emma’s concern, could be about Henry, Neal the whole situation, because this Emma is the one with memories of a good life, might be more easily moved to reveal her emotions. She is about to have a sibling and she cannot tell her son? There are crazy things going on, so any or all of it could get to her, without a specific event.
JMo did say that Emma Swan now (post happy life and no memories) is ‘softer around the edges.” She’s still Emma but she’s different than she used to because she was taken out of that life.
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"He was a lot of things to me" "The only conclusion was love"