When she neared her orgasm she grabbed the back of my head with both hands and held me firmly against her. Her body quaked with her orgasm and she did...'t release my head until it was over.I let her have a moment to recover before I eased up onto my knees and positioned the head of my cock against her wetness. I ran the head of my cock up and down in her juices then I pushed forward a small amount and eased the head into her."Holy shit, you're already stretching me with just the tip. Give me a. Then she faced opposite me and does some movement with her buttocks. She was teasing and inviting me for the next step. I could not control seeing her heavy buttocks. She was stunning sexy from her back. Hurriedly, I hold her from her back. But she turned back and again kissed me. This time her kissing was more violent and constant. And she was kissing me all over my face. At the same time she started to rub my hips.It was a great feeling. She bent down and took my penis in her hand and rubbed. She'd begun talking about our other "children." She was doing so well that she was able to cut back on many of the drugs that transplant patients have to take and was beginning a campaign to be allowed to have the two remaining embryos implanted in her. It scared me to death.It was true that she was a model patient. The heart turned out to be so compatible it might have come from her twin, but it wasn't a perfect match and she needed the drugs to keep her as healthy as she was.I think that's. I felt him stiffen, then start to convulse as he filled my mouth with thick, salty cum. He was a squirter, and I raised the back of my tongue to prevent being gagged. The cum pooled underneath my tongue. I got every drop. I looked up at him, opened my mouth, oozed his load over my tongue, and swallowed every drop. He handed me a paper towel, but I had nothing to clean up. He didn't, either. We thanked each other, and I left the room while he dressed.The booth across the hallway was cracked.