@pipiru &
@isoujiX
She definitely good a breast size reduction from middle to end.
But before that she also miraculously got a breast size enlargement between the start and the middle.
Compare her chest in the following panels:
1. Where she says: "Nope, not a one." --> Frontal view of her: Her shoulders are wider than her chest.
2. Where the guy says "The game of real life." --> Frontal view of her: Her chest is wider than her shoulders. = Chest enlarged
3. The foto in the last panel where she holds her baby. --> Frontal view of her: Her shoulders are wider than her chest again. = Chest reduced to original size.