The realization she had as "Oh... that would be lovely too" as I imagine she came up with the idea of becoming a mother, and as a mother, showering her baby with love and affection promising to make her the happiest girl in the world had me in tears
Akane reactions are what makes the humor in this manga amusing for me. She had this deadpan speechless surprised reaction after takezo started fighting it and it just made me laugh for 5 minutes non stop.