.. for us."Connie started to wiggle her bottom, rubbing her round globes against my cock, which was hard as a rock again. I could feel it throbbing ag...inst her luscious ass. I knew it would be weak of me to give in. I also didn't know if I was strong enough to say no."Oh, baby, I just don't..." Shhh, don't say no, Grandpa. Just be quiet, close your eyes and hold me... please."I did what she asked. I felt her moving - not leaving, just some sort of movement. One arm remained around my shoulders. I am in IT and I immediately came up with a tech solution. I ordered some covert cameras and set them up.After the first week away with the cameras running, I returned on Saturday early in the morning and everything seemed normal. Kathy was awake when I got home and gladly accepted the coffee I had picked up. I put down my bag and we chatted. After a short time, she gave me a kiss and left for a run. I knew that she would be gone for at least an hour so I went to check the recording.I brought. Then I jumped as he took his right hand and smacked her ass. She pushed him playfully away from her and as she turned to walk away, he reached out and smacked her again. She turned to face him, but he put out both hands and pushed her onto the bed right next to me. He fell on top of her pinning her down. Both of them were laughing.I started to laugh, too, then realized I was still naked laying next to them. I started to get up when he straddled her hips and kissed her. Becky broke the kiss to. I could readily make out a ridge of pink flesh at the top of her slit -- just below an arrow shaped tunnel of flesh that Abigail was rubbing so furiously. She had two fingers inside her cunt and was moving them faster -- fucking herself harder than I ever had. Her other hand was also there, under the first and rubbing vigorously at the top of her slit, sometimes side to side, sometimes in circles. Suddenly, her body seemed to relax, becoming heavy as she sagged downward upon me. I felt a shiver.