Joanne was in the shower washing off the combined sperm of the two men in her family from her hands and forearms when John came into the bathroom.
"Jo, are you OK?"
"Yes of course dear. Why wouldn't I be OK?"
"Oh, I mean, after what just happened on the deck. I feel fine about it, but I was just making sure you were alright too."
"Well, I don't quite know where we go from here. I can't go around masturbating Chris all the time. I hope it's helping him, but I suppose we just have to wait and see."
"Yes, I suppose so. He's gone back to his room and closed the door. I don't know if that's a good thing or a bad thing."
Jo turned off the shower and got out. She stood naked before her husband, drying herself off.
"But it's not really progress is it?" she said. "I would have hoped for a bit more openness from him. A bit more conversation, some questions, anything."
"Yes, well he is a teenager don't forget. Trying to get them to say anything to adults is tough."
"But after what has happened I would have thought he'd be overjoyed. After all it's not every 18 year old boy who gets jerked off by his mother and sees his parents having pretty extreme sex."
"True, but I think we can only keep on going. After all, it's too late to turn back now."
Joanne finished drying herself and pulled on a loose t-shirt. She thought about putting on shorts, but decided against it. It was a warm sunny day and the t-shirt covered her hips. Her breasts were swinging loose under the shirt. If Chris saw her in this he'd know she wasn't wearing a bra, and Joanne liked that idea.
"Do you think I should pull on these for the rest of the day?" Joanne asked, holding up a small pair of cotton knickers.
"Oh I think if you're not wearing shorts you should have on the smallest pair of knickers you've got," said John. "What about that white pair, the frilly see-through ones?"
Joanne dug in her drawer and pulled out a tiny lacy thong pair. It was small even for a g-string. The back was thinner than a shoelace, and the front was as small as possible, barely enough to cover the pubic mound. On top of that it was almost transparent.
"Now, that will certainly get Chris out of his room," said John. "He'll be following you around all day hoping to get a peek."
Joanne pulled them on and held up her t-shirt so John could see. The small strip of pubic hair she kept on her pubis could be seen easily and the lips of her pussy were barely covered by the material.
"I still think you should shave everything off β I'd love you to be completely bare down there Jo."
"Well, we'll see what Chris thinks β he hasn't had anything to compare it to yet has he?"
"Now that's a good idea β why don't we all go to Sunshine Beach? Chris can really compare female bodies there."
"That's a nude beach isn't it?"
"Clothing optional is the correct term. Yes, let's do that. It'll get Chris out of the house and he can see some naked girls. Why don't you go tell him?"
Jo agreed, and knocked on Chris's door. It took a while before he said to come in.
He was sitting at his computer again. Joanne walked over to him and hugged him from behind, pressing her breasts into his back. Despite their earlier intimacy, Chris kept his hands in his lap. Joanne wondered if he'd been playing with himself again. He'd removed whatever was on his computer screen when she knocked on his door. Obviously Chris still felt hung up about his masturbating.
"Chris, dad and I think it would be great if we all go to the beach. It's going to be a hot day and it would be good for you to get some sun."
Chris turned around, and by the nipples pointing through the t-shirt he realized with a thrill that his mother wasn't wearing a bra. He hoped the t-shirt was all she was wearing.
"But I'm happy here mom, happy to be with you." He wondered how he could get a look to see if she was wearing knickers.
"Oh I think you'll like this beach Chris β it's the sort of beach where even wearing this is too much," she said and lifted the t-shirt to show Chris her next-to-nothing underwear.
"Wow mom, those are incredible." Chris's eyes feasted on the white thong. He could see just about everything β even the lips of his mom's pussy sticking out from the sides of the tiny bit of transparent material.
"You like?" Joanne said as she twirled around for her son.
"Yes, I like very much."
"Well we're going to a nude beach, so you'll see plenty of nude women, young ones too, not just your old mom."
"But I really only want to see you, mom."
"Chris, I'm your mother. Don't you want to see girls your own age?"
"I haven't met anyone who even comes close to you mom. You look so beautiful and I love what you do to me with your hands. I've never cum so strong. What you did with dad was amazing β with your fingers up his β you know. Would you do that to me too one day mom? Please."
"Chris β you know I am trying to help you get more confident, but you can't just think of me as someone who will jerk your cock whenever you want. You have to have the confidence to approach girls your own age."
Chris looked downhearted and disappointed.