Question Soft body breast physics question

[National Nee San]

New to VaM, and i noticed that the soft body physics appear to act strangely. Around the edges, it is true soft body. However, as objects get closer to the center of the breasts, there seems to be some circular collison that pushes the entire breast away as a single unit. Is there are way to make the entire thing soft body, such that i could poke into it and it would deform all the way to the center?