When my sister asked me if I could help her with a some photo proof that she is not a virgin, I thought she had gone mad. But she said she needed a picture to show the girls in school to be accepted into the popular girls group.
I wondered why she did not just take a picture of her and her boyfriend, but she said that he had ended the relationship when she would not have sex with him because she was actually a virgin.
I agreed to help out and thought that maybe she was going to take a picture of a boy in her bed, but she said it had to look like we had sex, and we had to be naked.
I was very embarrassed when I undressed and laid down in her bed under the covers. But it was not good enough for her, she tore off the covers and told me to lie on the edge of the bed towards the large mirror, and she sat her self on top of my thighs with the front facing the mirror.
"No, this does not work!" she said, "It must look like that we have sex!" and she sat on my stomach so my dick was shown in the mirror.
When I felt her warm and wet pussy pressed against my stomach, my dick began to grow, “No, no, no, not now” I thought, and tried to think of sports, and other unsexy things, but it did not help, because after a while it was fully erect.
I felt the tip of my dick touched her stomach, and she looked down, “Here comes the screaming” I thought. But it was silent, and I felt that my stomach became more wet. Damn, was she horny?
"This is perfect!" she suddenly said and asked if I could keep it straight up, she did not want to touch it. I grabbed it, held it straight up, and she put her pussy against the tip of my dick, and started taking pictures.
"It must look like it is inside!" she said, and lowered a bit and the tip disappeared, and she continued to take photos, I closed my eyes and thought, "this is not happening". I opened my eyes again and noticed that she slid farther and farther down on my dick for each photo she took, when her pussy touched my hand, I let go of my dick and she continued to slide down.
When my dick was about halfway in, I heard that she began to breathe heavily and she began to have trouble holding the camera up. I did not say anything because I did not want her to stop, and I noticed that the camera came lower and lower, and it ended up eventually in the bed.
She let go of the camera, hold her breath and dropped down the last inches, and there came a loud moan from her as the cock disappeared into her.
She sat silent for a while, and I did not know what to do, I was so horny that I was about to burst. I placed my hands gently on her hips and began stroking her affectionately on her hips and down her thighs, she stiffen, almost like she woke up from a trance.
When she began to slowly move up and down, then I realized that this was the beginning of an interesting brother / sister relationship.