Co-accused are almost always on the receiving end of no contact orders. It's the same thing with young offenders -- they are put into separate facilities so that they do not have contact. This is to preserve information and to prevent co-accused persons from cooking up a new version of the truth. Whether they are friends, acquaintances, lovers, or enemies, it really doesn't matter. Preserving information and preventing perjury is the point of all this.
Many states do not recognize "common law". You do not have rights at this moment since you committed a felony crime. The no-contact order was put in place for a reason. Abide by it or you will be found in contempt and sent to jail.