We didn't have a big farm but it did have a large vegetable or "truck" garden that fed others and us. It was just starting to produce for the year and... I was harvesting the first crop for this year. Shirley called to me as I came in."Jack, listen to this!"From the speaker, I heard, "CQ, CQ, CQ, this is KG4AZQ, calling CQ. Over." Shirley said, "I think it's a recording. I responded and it continues to make the same call regardless. Listen." We listened to the same transmission even to inflection.. "That's my piss, Mother!" Billy exclaimed excitedly. ''That's my piss you're sucking!" Mmmmmm," Donna moaned, her eyes flashing up to his face as she sucked hard.Billy was still pissing, but the stream wasn't as strong as when he started. He had never pissed in his shorts before, and he found the sensation delicious, especially with his mother's mouth sucking at the tip so hungrily. As her son finished pissing, Donna went back to licking up and down his piss-soaked shorts, her tongue lapping. This had now stepped up a gear, and she was happy to tease me as much as I wanted her to, and I decided to tell her exactly what I was thinking. "You don't know how much I want to lay you down on the floor and pull your knickers to one side before slipping my tongue inside your pussy". She bit her lip as she looked down again in her sexy little way, and then said "Hmm I would love that". "I would lick my way along your pussy before lapping away at your clit and teasing my finger deep inside. I had sucked him for more than 5 minutes and he was squeezing my breasts and nipples when there was a sound and I knew it wasthe door leading from stairs to roof which had been opened.I froze, and was shivering with fear and apprehension that I had been seen by my sister while leaving the room. Though we sisters were more than friends and shared all our secrets, I had never told her about our affairs. He asked me to keep quite, put on his lungi and went out on the roof closing the doors.