if I saw right, she become, smaller, fatter and... oh no, her breasts shrink too

It's just part of my learning and development as an artist. I try to give the ladies I try proper proportions to their body in relation to their boobs, contrast to many other artists who are more comfortable with exaggeration. If her boobs were too small for Spy's preferences, I would have adjusted her entire form accordingly. But we both seem pretty happy with the end results~

Thank you for the observation, and I hope you don't mind my reply here.

No problem about where you answer.
and I know what you mean, we are always trying new styles, is just that the new version, looks more like the young sister of the old one XD