I didn't think a human being could get any redder, but my son managed it, somehow. Zoë handed me a bar of soap and a sponge, and I started working up a lather. I sat on the edge of the bath and began soaping Scott's back and shoulders, working my way round to his chest. He had a lovely smooth body, the only problem being his hairy legs. But we intended to do something about that.
"Stand up," Zoë said. Scott obeyed, meekly. Picking up another sponge, Zoë started soaping his legs. We were both working towards his groin, from opposite directions. I got there first, rubbing all around his beautiful meaty cock, which had already reached the horizontal, while Zoë lathered between his legs and around his balls. We continued to soap him until I sensed we might be approaching a critical point.
"Better stop now, darling," I advised Zoë. She took the shower attachment and hosed him down; seemingly fascinated by the way the water ran off the end of his erection.
"OK, out you get," I ordered. We towelled him off, taking care not to get him too excited. By the time he was dry, his cock was drooping again.
"Right, what's next?" he asked. I sensed he was more relaxed now, and actually looking forward to whatever we had planned for him. He soon lost his enthusiasm when he saw the razor in Zoë's hand.
"What are you gonna do with that?" he asked, uncertainly.
"Oh, don't be a dipshit," she replied. "We're hardly going to cut your cock off, are we?" My daughter, the perfect lady.
We quickly lathered Scott's legs with shaving foam, working up from his feet. Once again, when I got to his balls and cock I couldn't resist playing with them, coating his genitals with that creamy foam, working my fingers round between his cheeks. He drew in a sharp breath as I slipped a finger into his ass.
"Mum," he protested.
"What's the matter, sweetie, don't you like that?" I asked, innocently sliding my finger deeper. He moaned.
Zoë and I started shaving Scott's legs. When we got to the groin area, Scott turned pale, but Zoë told him not be a wimp. He kept very still as I shaved his balls and cock. Then we made him bend over and spread his cheeks while Zoë finished off around his asshole with an electric razor.
"Good boy!" Zoë cried, as she finished, giving Scott's ass a firm slap. "Now mummy is going to give you your reward."
Zoë bent over to empty the bath and clean it. Hitching her t-shirt up around her waist, she revealed her bare backside, as perfectly round and smooth as a peach. I positioned Scott behind her, only inches away. Standing behind him and slightly to one side, I began to masturbate him.
Several times while I was wanking him, Scott reached out to touch his sister, but I slapped his wrists and he stopped. The bath was clean now, sparkling like a new pin, but Zoë stayed leaning over, swaying her hips from side to side, taunting and teasing her brother.
Scott's prick was rock hard now, engorged with blood, as I wanked him faster and faster. Suddenly he gave a loud grunt, and thick white strings of cum were spurting from his cock, all over Zoë's ass. I wiped up the last drops, and showed Scott my hand, covered in his sticky mess. Then I lovingly licked my fingers clean one by one, taking them into my mouth, sucking them as I would a cock, maintaining eye-contact with my son all the time.