first "welcome" to hubpages dipsmi. What an unfair position to be in. Let me share a story. I was having an argumentative discussion with my mom on a topic once. We both were becoming slightly emotional about it. My dad, a very wise man many times, says "if you are going to talk then talk, but if you are going to argue then you should go home." Well being the 'son' I said, "it's my mom and it's our discussion." With a smile and finger pointed at me my dad replied sternly, "it may be your mom, but she is my "Wife!" Well, I got the message.
Another something. My grandfather stopped my brother and I from arguing when we were young once. He asked "what is this all about." It turned into a "I'm right, No-I'm right" kinda' thing. He laughed at us, which made us madder. Then he said "It's not who is right or wrong, it's about what's left." Then he told me to go in the front yard and think about it while he sent my brother to the backyard to think about it. I finally got the message.
I don't know your situation. But, I remember these often when I am in a situation as you described.