Finals were over. It had been a rough semester and I was looking forward to a relaxing summer. My typical M.O. was to load up on summer courses and stay on campus. I had always been kind of a "book worm geek" and was really most comfortable in a classroom or library. Back in high school I was not very popular, not a jock and definitely not part of the "in" crowd. I had kept to myself much of the time. Because I was pretty nerdy I was into the Internet before my friends discovered it and had viewed my share of porn. Even though I had never been with a girl I was positive I would know what to do if the opportunity presented itself. I was an okay looking guy but I never ever had a date. I did however possess, from what I could tell, an extremely respectable cock. Since you can't really wear a sign that says, "I'm hung like a horse", I had never had the chance to share it with anyone else. That's not to say it didn't get plenty of use.
Most of my friends had found summer jobs near campus but I had decided to go home this year. It had been a while since I'd spent any time with my family so I was looking forward to the trip. My mom and sister still live together in the house on the beach where I grew up and I was planning on wasting my summer in the sun and sand with them. My dad had passed away when my sister Cheri and I were little so it had just been us three for as long as I could remember. Cheri had bagged on college after high school but I was determined to get out of our little beach town and go somewhere else for college. My mom and Cheri liked life on the shore and were comfortable doing the beach and bar scene. They looked and acted like sisters since my mom had had us when she was still pretty young and they had always been close.
She never remarried but continued to work hard to take care of herself. My dad had left us a lot of money so she never had to really work for a living but she sure worked hard on her body. She had bought a gym and spent a lot of time there and so did my sister. She had employees who ran the place so they would just schmooze and workout. They were both in pretty good shape and all the guys teased me about having such a hot sister and a hot MILF. I kind of shrugged it off but I had to admit they did look good. Cheri was about 5'6" with long brown hair, long legs and a curvy hard body. Mom was a little shorter with curly blond hair and I have to say, a body straight out of Playboy. She really took good care of herself.
I had arrived at around 4 a.m. at my mother's house after driving all night back from school. The door was open as always and I had just snuck in and gone straight to my bedroom, stripped, and crashed. It was still morning when I heard some loud laughing coming from the driveway. I rolled over and looked out the window near my bed and saw my sister and some guy returning from what looked like a run. Cheri was wearing a jog bra and shorts and as usual she looked good. The guy must have been a regular at her gym because he was tan and very muscular in just shorts and running shoes. My sister made a gesture for him to be quiet and I heard her say something about me being asleep. What she did next practically blew the eyes right out of my head. While she was still on the driveway she pulled her top off, revealing a beautiful set of tanned tits, and threw it towards the back door. If I didn't know better I'd swear she'd had a boob job cause her tits were huge and round. They were just like my mom's though so I'm pretty sure they were original equipment. She must have been using the tanning beds at the gym. The dude was already in the shower stall and had started the water. Cheri then pulled off her shorts and shoes and confirmed it; she had definitely been using the tanning beds, and from the looks of things, she had been shaving extra close too. She opened the shower door and stepped in.
Normally I would not have violated her privacy but my curiosity had been aroused, along with my rapidly growing dick, and I felt the need to see more. There was a spot in our guest bedroom where you could see the shower stall completely from above. I used to sell viewings of my sister and her friends to my friends when I was younger. I quickly made my way there, wrapping a towel around my waist. By the time I got to my vantage point, my sister was having her tits sucked while she was fingering her slit and stroking the dudes dick with her other hand. Her eyes were closing in that pre orgasm kind of way and she was whimpering "yessssss, oh yesssss". Seconds later she shuddered in orgasm. The dude stepped back to let her return to earth and started to stroke his dick with a soapy hand. His cock was fair sized, not as big as my ten inches but probably a good eight. Cheri had opened her eyes and recovered by now and grabbed his dick and took over from him in stroking his tool. She stepped out of the way of the water and let the shower stream rinse off his soapy dick. Once he was rinsed to her satisfaction she turned her back to him and grabbed hold of one of the shower rails. They must have practiced this before because he moved right up to her and nuzzled the head of his dick against her pussy. In one fell swoop, he plowed all the way in and she let out a little yelp. Then they started a steady back and forth motion that seemed to rock the shower. Her tits were swinging with each thrust and I realized that I was really turned on. It was all I could do not to beat off right there but I really wanted to see this through.
She pulled away from him and said "not yet, big boy" as she dropped to her knees and took him in her mouth. She deep throated him and then sucked on his balls as she stroked his cock. After some more sucking and stroking she turned her back to him again. This time he moved a little slower and I realized that the head of his dick was not lined up with her pussy. She was trying to take him in her ass. I almost fell off the bed when I saw that. He worked his dick in slowly and then they started a good rhythm, in and out, in and out. Out of the corner of my eye I noticed trouble coming down the driveway. My mom's jeep had just pulled in and I could see that she had seen the two pair of legs in the shower. "This is bad", I thought to myself as mom walked over to the shower. Instead of hollering like I thought she would though, she started to strip. She had obviously been using the same tanning beds and razor as Cheri had. "God Damn" I muttered under my breath. She was one well preserved 39 year old. Her tits were even bigger and rounder than my sister's.
With a quick tug she opened the shower door and said "Save some for me Cheri".
"You know I always do, mom," Cheri hissed back.
I was stunned. Here were my hot sister and equally hot mom, naked just below me, and a guy balls deep in my sister's ass. Too much!
"We better be quiet or we'll wake Jason," my mom whispered to the two of them. "We...were...just...finishing...anyway," moaned Cheri. "Oh yeah" muttered the dude as he pulled out of Cheri. Just as the dude's dick left Cheri's ass, my mom dropped to her knees and sucked him into her mouth down to the root. He started fucking my mom's mouth in and out and I could see his ass cheeks start to tense up. Just then, Cheri reached around my mom from behind and held mom's big rack up and pressed her own tits on either side of mom's head. The dude pulled out of my mom's mouth with a pop, stroked one or two times and grunted as he shot his load on my mom's tits and face and open mouth. Cheri leaned over and licked mom clean. Holy Shit! They quickly rinsed off and stopped the shower. They whispered something I couldn't hear and grabbed towels from the hooks to dry off. I moved back from the window and high-tailed it back to my room.
I gave them enough time to get their act together before I went downstairs. The outside shower was really the only shower with any pressure in the house and was going to need a shower soon. My balls felt so heavy that I knew I would have a huge mess to clean up if I finished myself off in my room. I walked through the kitchen in my towel, trying to hide my huge hard on, past my now fully dressed mom.
"Good morning Jason, I hope I didn't wake you. Hurry with your shower, I'm making bacon and eggs for brunch", she yelled, as I brushed by. She was acting like nothing had happened.
Once in the shower, I lathered up. I was still in a state of amazement. I was standing in the very same shower where some of the best sex I'd ever seen had just occurred and I couldn't help but start to rub one out. My big dick was all soapy and slippery and the image in my mind of what I had just seen was going to bring me to one of my usually explosive orgasms pretty damn quickly. I have always cum a la Peter North, lots and lots of thick cum in six or seven spurts. I actually scare myself sometimes. I had to try and stay quiet so no one would suspect anything. All I had to do was think about the scene I had just witnessed. It didn't take long and I was soon coating the inside if the shower with my thick load. I rinsed off the wall and then finished my shower. I snuck back in and after dressing, made my way back to the kitchen.
Mom and Cheri were waiting for me. No dude. I pretended not to notice. After a great breakfast and the usual catching up conversation, we decided it would be nice to spend the rest of the day on the beach. I excused myself and went to my room to change into my suit while the others did the same. When I got back down mom and Cheri were nowhere to be found. I hoofed it up to the beach to try to catch up to them. When I reached the crest of the dune it was easy to tell where they were. A group of young guys were standing around too bodies on blankets off to the left. Just like Cheri (and I guess my mom) to flirt like that. When I got to the blankets, the guys dispersed and I finally saw my mom and sister. I had to bite my tongue and think about my chemistry final to keep from stretching out my jams with my dick. They were both wearing dental floss thongs and tiny tops.
