This story is 100% true and happened to me when I was in college. A couple of my previous stories are below: https://www.reddit.com/r/gonewildstories/comments/4buyd3/hot_tub_fuck_machine_m21f20m21f20m20f18m23f21/
https://www.reddit.com/r/gonewildstories/comments/4c88mc/she_squirted_on_me_so_i_came_on_her_m21f18f21/
One Saturday night my friend wanted me to come with him to a party. I didn’t have anything else on, so I agreed. It was a big 21st out in a paddock, there were hundreds of people there and they even had a blue-grass band playing in a barn. It was a pretty cool party but we didn’t know many people there, so after a couple of hours we decided to go back to my friend’s house and get drunk. We got to his house and I was pleased to see that his attractive younger sister (Alison) was home with a friend (Mel). Alison was reasonably pretty girl with a great body and perfectly rounded C-cup tits. Mel was a cute little freckled girl with B-cup boobs. She was slightly chubby, but in a cute puppy-fat kind of way.