I was shocked to see her shorts in a ball on the bed and her uncovered pussy in plain view. She didn't even move, so I assumed she didn't remember she... had taken her shorts off. I snapped a picture of her for later, then I quickly grabbed the panties I jacked off into the day before. I walked back to the bed and tossed them so they landed on her lower belly. "Might wanna cover yourself up, sis," I told her and walked out of the room.My cock was rock hard as I went back to my room and closed the. “Glad it worked as well for you as it did for us”, I replied. Do you often wank on public transport”?“No, not usually, but it is such a horny book and you two doing your stuff convinced me you wouldn’t be offended” she replied.“As if”, said Carl laughing.“So where are you going, just to Paris or further on”? I asked.Yes just to Paris, I’m meeting up with my friend for the weekend, she’s working here for the summer”.“Is she a ‘special’ friend”? Carl asked doing his quizzical left eyebrow raised. Like most of her furniture it had seen better days and it sagged badly. Not that I minded. In the DBLS (Days Before Long Skirts) the sagginess of that chair had provided me with lots of upskirt views of my modest and prudish mother-in-law. I had taken every opportunity to see the knickers I had seen in her underwear drawer “in situ” – especially when she rose from her chair. At that moment, no matter how tightly her knees had been clamped together up until then, they would part and give me a. They were now performing a ritual. When he stopped she let out a long grunt of protest. First he released her feet, then he cradled her and undid each hand. She was limp and moaning. He took her over to a cot against the far wall. He stepped out of his trousers, sat on the cot and placed her in his lap. He wrapped the pair of them in a comforter and rocked her. He kissed the top of her head and hummed a non-descript chant in time the motion. Her hair clung to her forehead and he brushed it back.