I'm a freshman in college and I live with my parents luckily. Last Saturday I was suppose to be heading out of town for a three day camping trip. I had called my parents the night before to tell them I wasn't going to be home for the weekend. Due to heavy drinking the night before we had a late wake up which worked out okay because I needed to grab a few things that I had forgotten at my parents. By the time my friend and I got pulled up to the house it was about 1000 or 1100 am and there was a car I didn't recognize and one that I did belonging to my aunt. The front door was locked which was very unusual so I walked around to the backyard not thinking anything of it and let myself in through the sunroom. As I quietly came in I heard multiple voice belonging to my mom, my aunt, and another lady. They were talking and saying some vulgar and sexual things. I listened for a moment and briefly hear my stepfathers voice. At this point I had to look. Carefully I poked my head around the corner to see into the living room. To my surprise, there was a large blanket spread across the floor, my very handsome and muscular S.Father was on all fours, my mother hand a strap on, on, as well as all of the ladies in the room. My mother was behind my dad grabbing his hips thrusting hard into his butt. My aunt had her hand on the back of his head and was violently making him suck and gag on the dildo she was wearing and the third lady to who I did not know was wearing the largest dildo I have ever seen. I couldn't stop myself from watching. I was grossly mesmerized... I surprisingly felt turned on by all of this. The more I watched my mother and aunt talk dirty to my dad and ram his butt, the more I felt myself getting wet. The third lady with the gigantic dildo soon took position behind my father and from where I stood I could see the struggle she had getting this too large of an item into my fathers ass. When she did start to get it in and push it inside of him he let out a tantalizing moan. As she worked him they talked nasty, he stroked his own large member and soon this lady was forcefully making my father cum all over the blanket. At this point *Oops*, I had been rubbing myself and my fingers were all wet and sticky. I went back to my friends car and called my mom and asked if she wouldn't mind running my things out stating that I was in a hurry. Soon shortly she gave me the things and my friend and I were off. I have since then rubbed myself to completion multiple times thinking of what I saw. I want to bring up the situation to my mother or aunt but am not sure how to or how I would explain that seeing my father like that made me amazingly horny. I guess for now writing confessions online is my best bet. Anybody have any insight on women fucking guys in the ass? Is this a common thing? Am I the only one who gets dripping wet over these kinds of things? I don't know why, but I do. I never would have guessed this of my parents. My Aunt though doesn't surprise me, she more or less a hippie and a slut. Just saying. Thanks y'all.