I was out in the woods right behind our garden trying my new high-definition video camera out. I had caught a young goldfinch out while it was trying its wings for the first time and was currently following a cute squirrel scurrying up a tree. "I'm sure humans are more fun." I turned around to face her. She was thirteen years old, tall and slim and very black with a beautiful, innocent looking face and the most startling blue eyes. She was holding the hand of her younger brother, who was as tall, as slim and as black as his sister. He too looked quite innocent and had the same blue eyes. "Me too," I said and turned the camera in their direction on the swivelling head of my tripod. The boy moved a bit away from his sister and she started to move towards the camera in tiger-like smooth and very seductive moves. She stopped after a short while and slid her hands up her bare belly, over her short tank top until she reached her breasts, which she gave a teasing squeeze. Her brother moved behind her and started to lick her ear and bite her neck while running his hands up and down her body. He rested both hands on her belly for a short while before running one up towards her breasts, lifting the tank top in the process and the other down, under the hem of her short skirt. My dick twitched as I saw her beautiful breasts in their full glory. They were not very big, maybe a bit bigger than the norm for her age, but they were firm and the nipples were long and wide and placed high on the breasts, teasing the world nicely. She pulled the top off and tossed it on the ground. In the meantime, her brother had kneaded her breasts and was biting her ear while she leaned her head back on his shoulder with closed eyes. He undid the single button holding the skirt up and it slid down to the ground, leaving her totally naked. I was breathing hard as I took her in. Nice six-pack, hairless in the crotch, very big clitoris partly unhooded, long legs and straight and narrow feet. Wow! She pulled her brother around and faced him. She began to kiss him and pulled his shorts down. Now he was naked too! She bent over to start licking him and I couldn't restrain myself any longer. I shed my shorts and walked behind her with my twelve inches punching holes in the air. I was hot and so was she. She was literally dripping juices from her pussy as I was dripping precum. She gasped when I entered her and bottomed out with about two thirds inside her. The boy grinned happily and tried to cup her breasts, which was a bit awkward from his position. I held on to her narrow hips and started to make love to her with smooth thrusts. After a few minutes she gasped again and I could feel the ripples in her pussy as it contracted with her orgasm. I pushed in really hard just then and passed the tight entrance to her womb. My pubis hit her buttocks with a slap as my erection disappeared completely inside her. "What a perfect fuck," I said and started to do her with full strokes. "What a perfect mouth," her brother said and winked to me. The situation was absolutely tense now and I wondered how much longer I could hold out. Not long, it proved. She had an orgasm, which triggered her brother as well as me. I sent truckloads of sperm directly up to her fallopian tubes and her brother made sure she didn't need another drink for the day by feeding her tummy directly. Wow again! When we pulled out, we were not quite finished shooting and managed to cover her front and back in a nice layer of hot jism. When we were finished, the children collected the clothes, while I stopped the camera. I turned towards the house and said, "I think I'm going to enjoy this video." "I'm sure you do, Dad," they said.