With a sudden click, he realized he was handcuffed to the chair."What are you doing?" he asked devilishly."Nothing. Nothing at all...." She seemed jus... a bit more devilish. Then again, she wasn't the one handcuffed to a chair. She stood in front of him, letting him really look at her for the first time since he got home. He was pleasantly surprised.A full length black dress, with a deep V neckline, showing her fantastic cleavage, and a slit running up each leg, to a high point near her hip,. Like a little rag doll I was towed along till we reached a class room at the far end of the hall. Alan opened the door and as we entered he closed the door and locked it from the inside and pulled down the "test in progress curtain". Alan pushed me over to the far end of the class room, by the bank of ceiling high windows. He spoke in a quiet sure tone 'we're on the fourth floor and class is in session. No one is going to disturb us for at least forty minutes when classes end'. I wasn't. I pulled a chair right beside him and sat down. The tables were covered with tablecloths that nearly touched the ground so I immediately slipped my hand under and started stroking his inner thigh. "Uh, I'm a married man, Tina," as he took my hand off his leg. "I know you are, honey," as I took his hand and cupped it over my naked pussy. "But no one has to know." I put my hand on his dick and started stroking it. His hand was still under the table between my legs. His dick was getting hard, and. "She then asked about the cost, and John told her. She was surprised that he had the whole system built for such a low amount.Maria then said, "As you probably know, we have some very serious pollution problems in Mexico, especially in Mexico City. Do you think this type of system would work there?" For organic waste, I don't see why it wouldn't, but if you have toxic wastes included, there would have to be a more complicated, and therefore costly system. I would have to think about how I would.