Generous F-cup breasts filled her orange prison uniform shirt well. Her green eyes might have been prettier though, were they not cold from a hard and...troubled lifetime. There wasn't a very large pool of women on death row to choose from, but Claire was sure she had a good candidate here. If she could get her to go along with it."I'm gathering volunteers for a medical study," Claire continued. "If you join, we will do exactly that." What kind of study?" the prisoner asked, still skeptical but. Ruth got on all fours on the floor, I knelt in front and she sucked my cock while Eamon took her from behind and started to pound her pussy.She was a great cocksucker and she was really enjoying herself. I could tell that she was about to come. I pulled my cock from her mouth, Eamon speeded up and Ruth very soon came to orgasm. Eamon pulled his cock out and shot his load over her arse. I tell you what he really shot a load.Eamon left us while he went to clean up. I stood up and Ruth then. Finally, after she begged me almost crying in tears, I held it at her pussy entrance and she pushed herself down on that hard dick…It took her time to just get the head inside of her. I sat down on the lounge and watched her pussy slowly engulfing his massive cock. The black dick got wider as she went down on it. Every stroke of her nice hips was sending some inches deeper inside of her womb.Her sweet labia stretched out as she would slide up on him. She got about half of his long shaft inside. Soon her right hand began descending and her left managed to be on both nipples at the same time. “Oh god Lisa you have a divine touch.”Shortly she crossed my mound and entered between my labia, gently exploring my soaking pussy. She chuckled.“What is it?” I asked.“You are dripping into my pool, but then so am I.”I laughed but stayed still to keep enjoying her touch. Shortly her thumb and middle finger were on either side of my clit and began to rub together. I felt a stimulation that was.