"I like it... but while Freya is like this, I can't really have sex with her..."
Benjamin stood in the doorway, stroking his penis under his bathrobe. Freya blushed, remembering the feeling of his penis suddenly not being able to penetrate her anymore, and when that made her pussy clench, peed a little more into the toilet she was sitting on.
"Why not? And you could always fuck me." Brianna giggled, pushing up the glasses on her nose and wiping her hair behind her shoulders to give him a better look at her bare tits.
"MMmmm... I could. And I will. But I want both of you. And Freya.. well her pussy is so small now. I just ram straight into that acrylic block..."
"PFff... men." Brianna snorted. "You think sex is all about breasts and pussies. You really have no idea how to please each other do you.." Benjamin looked blank, and Freya couldn't get any more embarassed. She shook her head.
"I'll just have to show you.. into the shower you two." She pushed Benjamin into the glass shower he was standing next to, passively allowing him to see what was going to happen. "That means you too," Brianna moved over to Freya and helped her out of her robe. She pushed her twin into the shower and took both bathrobes away, throwing them on a hanger. The two just stood next to each other, staring at her..
Brianna sighed, men were so clueless. She walked into the shower on her heels and turned on the water. She took a handful of body wash and started to clean Freya.
"Now, what you want to do is get each other all oiled up. Then.." she nudged Freya and Benjamin closer together, "You stand on one foot, like this," Freya lifted up her leg so she was holding her heel, and Brianna held her so she wouldn't tip over.
"Now Benjamin, you come over here," she took his penis by the hand and lead him to the right angle. "And.. here. Thrust."
He looked confused, then slowly slid his penis into the crook of Freya's bent knee. He slid slowly back and forth while Brianna posed them until they got the angle right and his penis poked Freya's vagina; Freya gasped in surprise. In the next thrust, Benjamin started to feel pleasure as well, the tip of his penis filling her pussy, and the rest of her smooth leg keeping the sensation tight and slippery.
"There you go ... now keep doing that. Use her leg, and rest your cockhead in her sweet little pocket pussy."
Soon Benjamin's face was pursed in concentration and Freya was open mouthed in pleasure, looking into his face. She gave little squeaks of ecstasy, when he would fill her palace suddenly, and soon he was holding her chin, looking into her eyes. Brianna stood back and watched as the pace increased, but never became too frantic, the position forcing them to keep a constant rhythm.
Finally, Benjamin came, and Freya clamped down on the tip of his penis, coming with him. The folds of her vagina had been perfectly prepared to feel every exact shape of his penis; and she shook from the sensation; for every last nerve of her vagina had been compressed into that small pocket.
The two looked each other in the eyes lovingly, Benjamin holding Freya in position as Brianna explained further.
"See? There's more to sex than penetration. The entirety of a woman's body is an erogenous zone.. which you have just discovered. You may need some.. experimentation to start to see each part of her as sexual as it is. But you will, and we have the chronivac to help you."