How to make these bones move with the character?

[Nacrex]

Sorry about the title, I don’t know how to correctly phrase it. This is the problem:
I have this simple armature and a mesh, parented with automatic weights. I wanted to go a bit further and make the breast react to gravity and movement, so I followed this tutorial https://blender.stackexchange.com/questions/41235/rig-that-reacts-to-gravity

Breast move fine, but when I try to move the character with another bone, this happens

English is not my first language, so I hope those images have shown you what the problem is.

[erickBlender]

Don’t worry about English is not your mother tongue many of us have the same problem just make sure people understand you
Please post a blend file if you a better answer