It was New Year's Eve, and we had some friends and family over. It had started as a more family friendly thing, until after a lot of drinking had been done, and a few people left shortly after midnight. It got pretty loud, and most people were gathered outside, lighting fireworks and watching other people with fireworks. I went back inside to be alone and drink in peace... and honestly I had become horny as hell seeing some of the women at this thing dressed the way they were, including my wife. But she was far too busy outside being loud with the rest of them. To make a long story short, while everyone else was still outside, I wound up alone with my teenage niece, who very willingly and excitedly sucked my cock and swallowed every bit of cum I shot down her throat. And then when we realized everyone was still outside and having fun, I fucked her, hard. We never even got our clothes off. She had her shirt up over her head, bra off, and her panties and leggings still dangling on her ankle as she lay on the couch with her head pinned againt and banging into the arm rest as I pounded her tight pussy. She slid the leggings and panties off when we moved down to the floor and I fucked her doggystyle, until I pulled out and shot my load on her cute ass and lower back. I'm sure we were too loud. But so were the people outside. When we were done, we made out for a bit after she had gotten her clothes back on. We said our goodbyes and she went back outside and mingled with the few remaining people like nothing had happened. I snuck out back to smoke a cigarette before hopping into the shower. I think she and her mom were here until probably 5am before they finally left, and we said goodbye acting like nothing had happened, besides one huge grin she gave me when no one was looking. I know this may not be for everyone, but I was in heaven. I don't know if it'll ever happen again, but it sure was great that night.