In Neverland, before the big showdown with Pan to get Henry back, Hook reveals to Emma the truth about their sword fight at Lake Nostos, and the consequence of it: she needs sword lessons.
The nights aboard the ship could be cold, and on their way to Neverland, the timeless land, Emma found out that the melody of the sea was too hard to resist.
Over the 4 months it took to save Henry, Emma and Killian had 4 times in Neverland and once in Storybrooke, each accompanied by a different feeling. Desperation. Anger. Jealousy. Passion. And finally – Love.