It was the summer I was 15, and I was happy living with my parents outside the city in a small, single-family house. I commuted to school in the city; it wasn't far, about a 30-minute bus ride. My house was close to a small, wild, clean river, where I often swam with friends who came from the city to visit. I was a bit of a wild person living outside the city, but I had friends who were more sexually aware than I was. We often swam naked and I could see that my friends' dicks were bigger than my 12 cm dick. But let's get to the point. My mother's birthday was approaching, and as usual, many of my mother's friends were coming. I loved my mom's birthday because her sister, Moni, would come. She was 50, younger than my mom, and my mom had just turned 55. I adored my aunt Moni; she was always kind and helpful to me, but I especially loved her body. My aunt had large breasts and often didn't wear a bra, so I'd sneak glances at her blouse, where the bulges from her nipples were visible. Her ass was very firm, though not large, with a more boyish shape. She usually wore short dresses, and when she bent over, you could clearly see her panties and the firm bulge where her pussy was. I always looked for opportunities to spy on my aunt when she helped my mom with birthday parties, because I knew there would be plenty of opportunities to see my aunt's panties and ass. Today she was wearing a thong, I noticed while my aunt was searching for something in the lower kitchen cabinet. She bent over for a long time, and I looked closely at her buttocks. I tried to see her labia, but they were well covered by the material of her panties. I only noticed that they must have been very fleshy, because the material of the panties was constricting them. It seemed a little suspicious to me that my aunt was bending over so much and shaking her ass so much that I couldn't get a good look at her. When she straightened up and turned to me, she smiled broadly and began to straighten her dress. Then she said to me, "You have to wait a bit longer; the most important thing right now is your mom's party." I didn't know what my aunt meant, so I replied, "I'll take care of setting the table." I left the kitchen, wondering if Moni had noticed me staring so intently at her lovely buttocks and the string of her panties tucked between them. The day flew by with preparations. The guests arrived, and Moni changed her dress for an even shorter one with a plunging neckline that barely covered her large breasts and plump nipples. Everyone was having a good time, but I was starting to get bored, so I told my mom I was going to my room. Then my mom said she had important news for me and would be over in a minute to tell me.

I went back to my room and started playing on the computer. A moment later, my mother came in and said, "Aunt Moni is staying with us for a few days. Uncle Stiv is taking the guest room. My father and I were wondering where Moni would sleep and decided she could spend a few nights at your place. You have a big bed, and you'll fit in just fine. No excuses! I asked Moni about it, and she agreed. Just tidy up your room a bit and go to bed; we'll stay up late."

I was in seventh heaven, Aunt Moni would be sleeping in my bed with me. I immediately pictured her large tits, delicately covered by her nightgown, and her deeply fleshy pussy lips no longer constricted by her panties. Thoughts were running through my head, I was worried that my little penis would stiffen immediately at the sight of my aunt, I was very excited and scared at the same time. I lay down in bed naked as I always slept, turned off the light and started waiting for Aunt Moni to come in.