>>719262383
SHE
IS
IN
A
POSE
She is pushing her ribcage outwards in the 2D art to reveal her cleavage. Look at a woman standing in a neutral position, her breasts will sag on the front normally, they don't push to the sides like balloons until you push your ribcage out
If the 3D model on the left were to be put in teh same pose, the breasts would move to the sides
have you never seen actual breasts in your life?