I was in high school and my girlfriends best friend was pretty hot she had a nice fat ass and I kinda wanted to get with her. She flirted with me alot and we had kissed before but nothing too crazy. One day it was me my girlfriend and her all laying on my girlfriends couch. Her friend asked if she could watch me and my girlfriend fuck and we were down for it. The friend was amazed when my girlfriend was giving me head because she didnt like to give head. My girlfriend tried to convince her that it was fun to suck dick and she said she could give her tips right now. My girlfriend looks at me and asks " you dont mind if she uses your dick for practice??" and I said not at all. I got a double blowjob from my girlfriend and her best friend and then my girlfriend fucked me till i came. I really wanted to fuck her friend so late that same night i texted her and we met up and fucked. it was one of the best fucks she has a great ass and rides cock like a champ.