I lived with my aunt Kelli and her husband in college. I always called her my sweet aunt, my mom's little sister. She was really cute, in a girl next door way: slim, long soft blond hair, C cups. Mid-30s. If she had dressed differently you'd call her sexy, but there was nothing overly sexual about how she came across. She was gentle and friendly and seemed like some who would call sex "cuddle time." Not a prude, just someone who seemed more like a mom than someone out for a good time. I was always surprised that there were no kids.

When I came back for senior year I found out how wrong I had read Kelli. She told me that my uncle had left when she had told him that she had some bi desires that she wanted to explore. Most guys would have been excited about threesomes, but he couldn't handle it. That was surprise enough, but a bigger surprise came a few days later when she introduced me to her new girlfriend Li. Li was at least partly Chinese, I guess, and pretty much Kelli's opposite in every way. Where Kelli was soft and girl, Li was slender and gave off a real "dom" vibe. Kelli liked sundresses; with Li everything was tight and black.

I'll never forget the first night that Li stayed over. From their bedroom down the hall I started hearing high-pitched moaning. It was soft at first but then got louder. Clearly it was Kelli doing the moaning. I had lived down the hallway from her for three years and never heard a peep from her bedroom, so clearly Li was making her feel something that my uncle never had. A couple of times I heard Kelli say "Quiet!," but she was the one making all the noise and she started right up again. Finally she announced in a loud voice that she was cumming.

You can imagine how turned on I was listening to this, picturing Li with her tongue between my sweet aunt's thighs. I was debating the morality of stroking off to this image when my bedroom door opened. It was pitch black, so I couldn't see who came in, but then someone asked "I guess you heard that?" It was Li! I pointed out that it would have been hard not to. Her hand reached down in the dark and found my rock-hard shaft. "I guess that you enjoyed it, too. Good. I'm mostly into girls, but whenever I get eaten out I start craving dick. Don't cum too fast." With that she preceded to mount me, facing away. Neither of us needed any foreplay; she was already dripping wet. "See if you can make me scream the way that I made her." She did all the work as I just laid back and tried not to cum. I lasted longer than I expected, and from the way she moved I think she enjoyed the ride, but I never heard a peep out of her. When I finished with a groan I said "I guess you didn't scream." "Don't take it too hard, kid. I never do."

That night was just the first of what became a regular occurrence. Every few nights Li would stay over, driving Kelli to one screaming orgasm after another. Then after a while Li would come in and satisfy her craving for cock with me. She moved like a snake, but it was always in the dark and she was always on top. And as she was sliding up and down my prick, she would tell me some new revelation about my aunt's sex life.

"Your aunt hasn't really learned how to eat pussy yet, but I'm teaching her."
"We went clothes shopping today, and I made her eat me in the dressing room. I would have done her, but the whole store would have heard."
"I think that your aunt is starting to miss dick. Tonight she asked me if I have a strapon. I told her that she should just do what I do. Who needs a plastic dick when there is a nice big real one right down the hall. From the look on her face, she'd been thinking about it."
One night after Kelli had been especially loud. "I was fucking her from behind and she said that my strap-on wasn't big enough. So I slipped in her ass."

Li was by far the best fuck that I had ever had in my young life. Still, once the newness wore off, I found myself thinking about Kelli even when I was inside Li. One night they apparently brought home another girl. I was able to listen to Kelli's moans as I fucked Li, and I pretended that it was her on top of me.

All of this happened at night. During the day, Li was never around and Kelli was just Kelli, like she had always been. No sex talk at all. But one afternoon as I was coming home from class Li was leaving, and she told me that she'd left me a present upstairs. When I got to the stop of the stairs Kelli called out from her bedroom asking if I could help her. When I came in, I was shocked to her completely naked, handcuffed wrist and ankles to the bed. Apparently she and Li had been playing and Li had left her for me to find. Her legs were spread apart, and her pink pussy lips glistened from behind a well-trimmed bush. Her soft breasts were tipped with puffy pink nipples. I was instantly hard, and my body was screaming that I should take her then and there. Is that what she wanted? But she said that Li had played a little joke on her and told me that the key was on the dresser. I freed her wrists and handed her the key so that she could do the rest. Then I went to my room, locked the door, and pounded one out. Laster, she was just Kelli again, my sweet aunt. She cooked me dinner but made no mention of the incident.

The next week I again saw Li's car in the driveway when I got home from the gym. As soon as I came inside I could hear Kelli moaning. At the top of the stairs I saw her bedroom door was open, and I stepped to the doorway. Li was lying on the bed, at the edge. Kelli was kneeling on the floor, working Li's pussy with her tongue. I watched for a moment until Li's hips bucked in silent release. Then she saw me, and told me that I was just in time. She spread her legs even further, inviting me to take my turn. I was quickly out of my shorts and t-shirt, and I saw Kelli's appreciative scan of my body. She even paused to ogle my cock an extra moment or two.

I took her place between Li's legs for a standing fuck. The first time that she wouldn't be on top. Kelli moved to straddle Li's face for her own ride, facing away from me. Kelli had been wearing a t-shirt, but when we locked eyes in the dresser mirror she peeled it off, lifting her breasts with her hands. She was clearly putting on a show for in the mirror. It wasn't long before Li had her moaning again, and it took all my effort not to finish too fast. Kelli didn't make the same effort; she orgasmed fast and hard. Then she moved to the edge of the bed and gave Li's clit some more oral attention as I was still pumping in and out. When I felt was I realized was Kelli's tongue catching my shaft with each stroke, though, I soon shot my wad. Was it an accident?

I think that I got the answer to that question a few nights later. I was laying in bed when moaning started up again from down the hallway. But it lower, throatier. That was Li, not Kelli. Apparently Kelli had learned some new trick that was really hitting the spot. It was Li begging Kelli to keep going, Li, screaming that she was cumming. And when my bedroom door opened, it was Kelli's hand grabbing my prick, Kelli's full breasts pressing against me as she slid into bed, Kelli's soft bush that my hand sought out, and my sweet aunt Kelli's voice saying "See if you can make me scream like I made her."