Making his sister walk with her legs open

And you guys these stories are true.At the time I was 17 and my sister was 25.It was winter and I was watching a movie in my room, that's when my sister came into my room asking to watch the movie with me. I accepted at the time, I have to say that my sister is very hot, she has a little round butt, hard little boobs and thick cocks. Continuing the story, she lay in bed with me and we stayed under the blankets because that day was very cold. Since the bed was a bachelor's and I'm much taller than her, she sat with her butt on my lap.Oh I didn't hold it, my stick started to harden and lean more on that little bundle, I didn't know what to do. But I liked it when I realized that she started to pass her hand on my thighs. So I put the mask down on her side of the waist and she pulled the muzzle down until it reached her little mouth, and as the story goes on, she sat on the bed with me and we stayed under the blankets because that day was very cold. Since the bed was a bachelor's and I'm much taller than her, she sat with her butt on my lap, and I didn't know what to do.
Then I got up and went to take off my shorts, she sat on the bed, took my pinto and started sucking, (here I realized that she was crazy for milk but that's another story), started sucking the balls then was licked the head, until she swallowed everything, and started going back and forth, when she realized that I was going to enjoy, she sucked harder, until then I enjoyed in her little mouth and she drank everything.Then we started a 69 for me to recover, when she saw that I was already on the verge of a bullet, climbed on me and began to ride, I sucked her pinto by biting little bites on the pinto, she was satisfied with the head.Then she said it was 4, she realized my intention, and I didn't want to give up the fear of the balls, then was licked the head, until I swallowed everything, and started to go back and forth, when she realized that I was going to enjoy, she sucked harder, until then I enjoyed in her little mouth and she drank everything.Then we started a 69 for me to recover, when she saw that I was already sucking her pinto by bites, she was satisfied with the head.