It all started so suddenly.
I was 20, living at home while going to college. My family is... I would say well off, but the honest truth is we're loaded. My dad works long hours and makes a ton of money as an exec at a large company. We really don't long for a lot of stuff. We all drive nice cars, my schooling is paid for, even though I don't take it too seriously, and we have all the latest toys. I'm studying computer programing, and my sister Allison, one year younger at 19, just started this year studying acting. We have another sister, Hannah, still a senior in high school.
Allison an I get along as well as siblings one year apart do. We fight sometimes, but we usually drive to school together, and our friends hang out in similar circles. We've both dated each other's friends, both in high school and in collage. We had similar features, but we didn't look alike. I'm a big guy, 6'3", and pretty muscular, having played basketball and football in high school. I put on a few extra pounds in collage, but still had a good physique. I kept my brown hair cut pretty short, and usually dressed pretty casually, jeans and a tee shirt.
Allison was in cheerleading and acting in high school. She was tall, too, about 5'8", and had long red hair down past her shoulders. She worked out constantly, having kept her high school figure, and showed it off all the time. Short skirts to show her legs and ass, tight tops that hugged her figure and accentuated her perky C cup tits... many of my friends were constantly hitting on her, and a few actually had gone out with her. I tried to avoid hearing any details, but rumor had it she was a great fuck.
Allison and I were coming home from school one day. She was driving her convertible; I was riding in the passenger seat listening to music on my phone. We were getting home early on the day, my last class being cancelled for the day, and we had gotten into a fight over... something stupid, normal sibling crap. I was ignoring her, she was ignoring me, we were just hoping to get home and avoid each other for a while.
We pulled into the driveway, and she quickly jumped out and stormed into the house through the garage. I rolled my eyes at her dramatics and followed, still listening to my headphones. Looking down at my phone as I walked in, I ran directly into her as she was stopped just inside the doorway, just standing still.
"Allison, what the..." I started, pulling my headphones off as I looked up to see what she was staring at, and suddenly I could see... and hear... what had stopped her in her tracks.
Our garage door entered into our pantry, which led into our kitchen. From where we were standing, we had a great view of the dining room, and could clearly see my mother bent over at the waist, moaning as a large black guy fucked her from behind. Her hands were braced against the kitchen table, pushing her naked torso up and back to push her lover deeper inside her.
I was dumbfounded. I had never had any thought or inclination that my mom could be cheating on my dad. I stood, staring at the scene, Allison leaning back against me slightly as she stumbled back. I managed to catch the door before it slammed and shut it quietly, not knowing yet what I wanted to do about the scene that was unfolding before me.
On one hand, I was furious. We were always a close family, we went on vacations, had dinner together when dad was home, went shopping together, holidays... everything. And my father worked hard, long hours, and absolutely doted on my mother, no way did he deserve this. Part of my just wanted to storm in there and demand an explanation, stopping this lewd act in front of me. On the other hand...
Mom was hot.
I always knew she was attractive. Her long, red hair fell almost to her ass, she had huge tits (fake, but who cares), worked out... all my friends called her a MILF, which I good naturedly accepted. I had never seen her like this, though. Her tits shook with every thrust, her body covered in a thin layer of sweat, her hair wild and unkempt. I also noticed she was shaved clean, and the way she moaned and talked dirty got me even more excited.
