These are significant moments because Helaena is portrayed as touch-averse.

Furthermore, this is a device to show the development between Helaena and Alicent. Helaena shrunk and pushed away her touch in season one, but grows to want it in times of conflict in the second season.

This is likely where Helaena made sense of the fate of the war, which she tells Aemond about in the season two finale.