Weird dent in mesh body?

[Kniffelig]

I've been working on this fitmesh body for a while, and the last test I tried, I noticed that the breasts had dents in them. I don't know what it is, the mesh itself looks fine, and the weights and rigging seem okay. 
The dents only show inworld, so I assumed it was the weights, but I've tweaked them repeatedly, and nothing seems to alter the dents at all. 

What else could it be and how do I fix it?

[Angelik Winslet]

Check the weights of the skin bone, apparently are interfering in the chest, may be come from elsewhere in the body, could be shoulder, clavicle, or something.