Ideally, one would both be able to be honorable (i.e. to do the right thing especially with regard to others) and be in solidarity with relatives and friends (i.e. to support them, especially when they come into conflict with others).
What Biblical advice--according to Protestant interpretations and accepted texts, and a modern translation like NIV or ESV, if there is not a common view on this matter--is there for situations when these two virtues are at odds: when someone with whom you would normally be in solidarity does something dishonorable? Does it make a difference how serious the offense is (e.g. allegations of abuse vs. going back on the spirit but not the letter of an agreement about some mundane matter)?