My husband and I are currently living with my in-laws (husband's mom and step-dad). This in itself is not a problem. I love and get along with them both. The problem is that my husband's step-brother also lives with us, and he is a pathological liar, manipulator and troublemaker who has a big problem with authority. He takes this problem out on my mother-in-law, and manipulates his dad into thinking she's the bad guy. He is twenty-one, thinks he can get away with anything and acts like he's still seventeen. I was managing to stay out of the way of this for the most part, but now, my father-in-law is insisting we have this big family meeting so we can resolve this. I hate conflict of any sort. My hands are shaking and sweating right now jut thinking about it. This meeting is going to be nothing but one big argument, and none of it really concerns me because I'm the one who gets along with everyone. How do I get out of this thing without offending anyone? Any advice?