Making a point to my buddy by showing off his girl's authentic homemade skills

So, me and my buddy have been going back and forth for a while now. I've been dropping hints about his girl not being as good in bed as he thinks she is. He's been a bit defensive, saying she's the best. I knew better, and I decided to show him. I invited them over, and as soon as we got into the bedroom, I started making my move on her. I knew she was ready for it, and I could tell he was a bit shocked. I started going down on her, licking her pussy and ass, making sure he could see. I could see him watching, his face getting redder and redder. Then, I started sucking on her tits, all while looking at him. I could see he was impressed, and a bit turned on. I knew I made my point, and I hope this will finally shut him up.