If you are close to power, then you need to understand that your standing with those around you is always fluid.  You need to be comfortable with that, and understand that as much as it may seem to be the case that those close to you are your friends, they are not.  They are there because they like power.  If you happen to be in their way, then watch your back; even as you carefully maintain your smiling, relaxed demeanor.  This situation is not cultural; it is biological, and it is hard wired.  This is how it always has been, and how it always will be.