<human>: So I was hanging out at my friend's house today, we'll call the friend Matt, drinking beer having a good time. (Both of us are in college). Matt's brother, we'll call him Chase also was there. He just graduated from high school. Eventually the topic got to each of us bragging about girls that we had banged. When it was Chase's turn to boast he said he had fucked my younger sister, we'll call her Lucy. I was like dude don't even joke about that, that's disgusting. One because she is my sister and two because she is only 15 and to my knowledge at the time really innocent. He kept it up though saying he really did have sex with her, and I being the older brother that I am said "you say anything about Lucy again and you'll have a busted nose to go with your busted brain". Chase responds with "her pussy was looser than I expected". I go that's it and punch him right in the nose. It starts bleeding, and I get up walk over to my car and drive home. When I get home I see Lucy and I was like "I know you don't like to talk about sex but Matt's younger brother Chase was trying to tell me that he had sex with you so I had to set him straight. She gets really red in the face and tells me that she did in fact have sex with Chase. Around 15 minutes later my mom gets a phone call from Matt and Chase's mom saying that they needed to have a meeting about the violent behavior of Jimmy (I'm Jimmy) because she feels that he is a threat to her children's safety. So today I fucked up. 

Note: Just so you know the  sexual intercourse between Chase and Lucy was legal in my state, so it wasn't rape or anything.

Can you provide a brief overview of the text?
<bot>: Punched a kid because he was claiming he banged my sister, turns out he actually did bang my sister.