Then, figuring she would want the same position, I started to get up. But she had other ideas in that department, too, and pushed me back down. Then she straddled me and raised herself up as high as she could stretch. It wasn't enough, so she rearranged herself on her feet and squatted directly over my cock. I reached out and steadied her by the shoulder as she used both her hands to line me up. Once she was sure of our positions, she lowered herself directly onto me and I popped inside. She closed her eyes tightly, gritted her teeth, and sucked in air, all at the same time.

But I was inside, and she recovered from the pain very quickly. Soon she was lowering herself, taking me deeper and deeper inside her rectum. A strange, almost determined smile spread across her face as I went deeper and deeper, until finally I could go no farther, and she shifted herself until she was once again on her knees.

Soon she got into her own rhythm of moving forward, then impaling herself once again. We were soon exchanging 'peck' kisses every time she came forward. Then we were touching tongues with each of her 'out-strokes'. It was another truly erotic series of movements, with her doing all the work and definitely enjoying herself immensely.

Trisha, for her part, was about worn out, and just laid quietly on the bed, watching her sister and I do this sterile variation of the eternal dance of love. Then Julie began having some smallish, rapid-fire orgasms that drove her to move harder and harder as she rode my cock. Soon, the intensity of her releases increased to the point she had to pause every so often just to let them run their course and allow her to regain control of her muscles.