Hi. I know how hard it is undergoing that certain situation, which in the first place, you have accepted when you joined that company. Living with 'housemates" whom you go to the same office, is really diffcult... No matter how close you are together and, you consider them as your friends already or better yet close friends, still, critical issues would come up anytime... From simple use of the house facilities to the office or work grievances you discussed up front...
Be careful to the people whom you talk to about this sensitive issue, either choose them wisely to confide or face the music yourself.
Be watchful. I assumed that you are "really affected" on this situation, but keep your cool... Always watch your back, if you don't know who are you dealing with.
Be confident. Deal with the situation without showing them how "pissed off" you are. Be a street smart.
Lastly, if the situation is really full blown, which I hope not, either take the challenge or you leave... But once you leave the company, always leave with your intact dignity and gained respect.
I wish you a peaceful mind. - lissa