Stood up for someone!

The only time I have stood up for someone is when they are talking bad about one of my friend or family members. So one time we had a party at my house and a lot of people showed up and my brother girlfriend that a hate really bad her ex boyfriend is my best friend and she started talking shit to him so I had to step in and that was not vary good we started fighting. I really hate when people talk shit about one of my good friend.