It's a massive hand, I hadn't noticed before. It moves in a circular motion, slowly. The palm lifts off me and it's now just the fingertips that touch...me. They edge over my knee and gently caress the inside of it. The whole sight is so erotic, probably the most erotic thing I have EVER seen. I turn my head over to the driver and he is still transfixed, his lips are slightly parted and there is a quiet sound coming from them. As I focus more I hear, "So smooth, so so smooth". My eyes move down. He wanted to touch them. He wanted to see his mother's bare tits. "I said no Brad. Last night should never have happened. It won't happen again. It is very wrong for a mother and son to have sex together."Brad's erection controlled him as he stood in front of his mother. She was saying no but her nipples poking teasingly at the front of her pajama tops told the boy that his mother was horny still. Brad pulled the front of his briefs down exposing his hard six inches to his mother. He used his. She touched the precum and licked her finger, played with my balls gently.My cock grew bigger than it had for a long time. I could feel her breath on it, she moved it around and looked at every vein and bump. (I am circumcised and around 7 inches long) It felt like hours but was around 5 minutes, I think. She stood up and thanked me and said it was my turn. I sat her on the bench seat and spread her legs. Wow it was perfect and very wet. I played with her hair a little and moved towards her. She told earlier that it would take about 30 min to reach to her home.After about 5 – 7 minute our ride started, the rain came. First with few big drops. She did not show any intention to stop and take shelter. Then the rain drop size reduced but intensity increases and started drizzling. With moving bike, I could see gradually front side of her white shirt was being moist. I was about to ask her if she wants to stop – suddenly the sky opens up and it started pouring! It hardly took 10 second.