My twin sister and I were invited to spend the summer at my aunt and uncle’s house. The year was 1950 and there was no air conditioning available on their farm. Aunt showed us our room which contained two twin beds. Sissy and I have shared a room since we were in the womb together. It was not unusual to see her remove her gown and lay on top of the sheets just wearing her panties to beat the heat. We celebrated our 18th birthdays a month ago and was given this trip as a surprise present. Mother told us that we have become adults and needed to see more of the world and experience new things.
Sissy fell asleep quickly and I layer there looking at her silhouette in the moonlight coming through the window. Her ample breast were moving up and down as she breathed. I have never thought of her as anything other than my twin and best friend although her beauty is noticed by everyone. At about midnight, I heard the door creak open. My uncle came into the room and moved over to sissies bed. He had a small lamp with him which he sat on the end table. He was naked and stood beside her rubbing his cock while looking at her breast. He climbed over her and kissed her, waking her from her deep sleep. She started to say something when he put his hand over her mouth and whipered to her that it was mother’s plan to have us educated in life this summer. He began sucking her nipple causing them to grow hard. I could see his hard cock laying across her thigh as he began rubbing her pussy through her cotton panties. He eyes were closed as she began breathing harder. He pushed her panties down exposing her hairy pussy. I’ve seen it 1000 times but this is the first time I’ve ever seen it swollen and leaking wetness like this. I watched as he moved and placed his cock at her mouth, tell her to open and take him in. She did as instructed and he began fucking her mouth. I swear his cock grew even harder as she sucked his mushroom head. My own cock grew hard watching. I’ve silently mastubated before but never while watching sissy.
He pulled out of her mouth and moved between her legs. He whispered that this is going to hurt at first but she will grow to enjoy it immensely later. He pushed his hard cock into her tight pussy as she tried not to cry. He stayed still for a few minutes to allow her to adjust to having him inside her and then began to fuck her slowly. After several minutes, she arched her back and it looked like she had her first orgasm while being fucked. Uncle picked up the pace and after a few more strokes, pulled out and shot cum all over her belly . He then kissed her again and took his lamp and left the room. I layed there hard as a rock while trying to comprehend what just happened .
Source: reddit.com/r/Erotica/comments/yzbfj7/twins_his_story_mf_insest