‘Really? You promise I’ll like it?’ ‘Promise. Now, go have a quick shower while I get set up, come out gleaming and prepared for the start of ... great new thing.’ I went and got a harness and pondered which dildo to use. I fancied the idea of using the same one his wife had fucked me with, but got a selection of other sizes for educational purposes. I also got the camera and set it up, plus I also put my phone and ipod recording at strategic places. I wanted to catch as much of this as possible.. How could I refuse such a request? So, I stood next to her for a bit. Instead of gathering her into my arms, I slowly moved my hand and gently took hers in mine. She didn't resist at all, and in fact lowered her head to my shoulder. We stood that way for quite a long time.After a bit, she raised her head and gently kissed my cheek. I turned my head and gently placed a kiss on her mouth. She raised her arms and wrapped them around my neck. Her tongue started to trace the lines of my lips.I. And today was no exception. I undressed her and she undressed me. While doing so, I kissed her forehead slowly while hugging her. My erection was not under my control as such. But, I was beyond care as this was a time that really got me on :) I slowly started licking her forehead and kissing her cheeks. As I neared her ears, I started nibbling it. She loves that very much and let out a gasp. That turned me on more and I started licking her cheeks and came down to her neck. I was kissing her. I had to see her, but.... what then?I moved to the side of a tree and quietly moved a couple of branches from the bush next to it up just in time to see the two beautiful globes of my sister's ass break above the water as she began swimming away from me. Yeah, she was 38 now and not 18, but she still looked fabulous. Her boobs had grown to full C-cup size. But even earlier in the day, I had noticed that her fuller, mature hips now made her into a truly sexy woman. Seeing them as they slid.