Unspoken Pleasure (erotica)
Use Your Sisters Instead: EP7

"Michael is this true?"

Mary heard footsteps echoing down the hallway.

"No way," Chastity said. She stood behind her mother, staring in wonder at her brother and sister on the bed.

"I'm sorry, Mom," Michael said, "I was in my room and feeling, you know. I was going to start rubbing but I know that's wrong. And then I thought, well, doesn't this solve the problem completely?"

"Well..." Mary said, starting to feel herself pulled towards saying yes. I mean, I guess I should be proud of the boy in some way.

"M... Mom?" Hope asked.

"He's not hurting you now is he?" Mary asked.

"Oh GOD no," Hope said, "Though he is... uhn... neglecting his lubrication duties."

"Sorry, sis," Michael said. He let go of her hips and started massaging her breasts.

"Oh, that feels great, Michael," Hope said, "But I'd like it if you touched a little lower, too."

Michael obliged. He took one hand and started rubbing between his sister's legs. She moaned appreciatively.

"Well as long as you're not hurting her I guess it can continue, for now," Mary said, "Just don't do it every time."

Given permission, Michael and Hope seemed to speed up. Their movements became more frantic. The sounds of their sex grew louder and less restrained. Instead of just lying back, Hope moved her butt up and down to match her brother's rhythm. Her sex hungrily stretched around his cock.

"But Mom," Chastity said, "It's not fair that Hope gets to fuck Michael and we don't."

"Yes," Tabitha said, "It seems like something we should each get to experience."

"I don't know..."

"It's OK," Hope said, her body bouncing, "OH! So good! Michael c... clearly knows how to treat his ssssssiiiiiisters."

"Fine. It's agreed," Mary said, "Now let's give them some privacy." She herded the two girls into the hallway and carefully closed the door behind her.

As she walked down the hall, she heard the telltale sounds of the siblings' shared crescendo.

*

Mary had to run errands that afternoon, but she came home to quite a sight. Chastity was bent over the couch, completely naked. Blonde hair ran like waterfalls onto the cushions. Her prominent posterior hung over the armrest, lewdly displaying her vagina. Chastity had bragged to Hope before that her clitoris was easy to replace and Mary saw that her daughter wasn't kidding. Chastity's little man in the canoe was more like a giant in his yacht.

Michael stood behind his sister, just as naked. He had his hands on her hips and was lining his cock up like he was about to penetrate her.

"Oh, hey Mom," Hope said. She was sitting on the couch by Chastity's head, lightly stroking her sister's golden hair. Hope was fully clothed, but Mary could see that telltale flush running up her daughter's neck. "We're just doing our sibling duties."

"Um, I can see that," Mary said. She almost dropped her groceries to the floor. "But do you think, maybe, it might be better to, you know, do this someplace more private?"

"It was way easier to fit everyone out here," Tabitha said. She was standing by her brother's side, also still completely dressed. She had on her glasses and seemed to be studying the entire act like it was a new science project. Mary practically expected her youngest daughter to have a notebook and a pen.

Mary wanted to complain, something about this seemed particularly unwholesome. She couldn't say where it crossed the line exactly. The public aspect of it, perhaps. But then she'd already given them permission for that. The way all three girls were getting along, helping their brother, Mary was almost proud. From a certain point of view.

"Can we get on with this?" Chastity asked, "This isn't exactly comfortable you know."

"Quit complaining and take your brother's dick like a good little sister slut," Hope said, giving Chastity a light slap on her cheek.

"Hope!" Mary said, "I won't let you speak to your sister that way."

"Oh, I don't mind, Mom," Chastity said, "It's part of my ummm, lubrication process."

Mary looked over and, sure enough, her daughter's vagina certainly seemed ready to take a penis. The lips were dark and hanging open. A thin line of girl drool dripped down to the carpet.

"Girls, I'm sorry," Mary said, "Something about this seems off."

"Well, why don't you stay and supervise Mom?" Michael asked.

"That would be great Momma," Tabitha said, "That way you can correct us if we do anything wrong."

Oh Lord, preserve me. "Well, OK. I guess."

"Excellent," Michael said, "Tabby Cat, will you go ahead and do the honors?"

Tabitha gave a little curtsey and stepped forward. She took her brother's cock in her hand and hung the head in Chastity's opening. She did it daintily, like hanging a dress that she wanted to keep wrinkle-free for a fancy evening.

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Chastity made a little grunt as Michael started pushing forward. From this position, Mary could easily see Chastity's vagina stretching to accommodate her brother's thick, purple pole. Michael sighed, content, as his testicles bounced against his sister. Fully buried between her legs.

"God that's nice," Chastity said, her voice muffled by the pillows. "You may be an idiot, bro, but you have the best cock."

Michael slapped his sister's ass. "Damn straight. About the cock part, I mean. Not the stupid thing."

"Seriously," Chastity asked, her voice muffled by the cushions, "You're making my point for me."

They moved in silence for a while, creaking against the couch. Michael ran his hands down his sister's flanks. Tabitha watched them both, intently. Sometimes bending down to get a different angle. It really felt like some sort of strange demonstration. Human Reproduction 101.

Michael moved almost gracefully in his sister. He was clearly trying to be gentle.

"Jeez, are you trying to tickle me or what?" Chastity asked.

"Language, dear," Mary said.

"Well then tell Michael to quit messing around and fuck me," Chastity said, all pretense of propriety gone. "I can barely feel what he's doing right now."

"This is how Hope liked it," Michael said.

"Well save it for when you're with her, then. I'm a real woman and this pussy needs pounding."

"Every woman is different, Michael," Mary said, "You need to respect what Chastity is doing for you, by understanding her unique needs."

"Oh OK," Michael said. He started to pump Chastity faster. His thighs slapped against his sister's ass. Squelching sounds filled the room. Mary could smell Chastity's unique, feminine scent. There was something sort of beautiful about this, in a way.

Chastity reached back like she was about to rub herself, then stopped. Hope noticed her sister's dilemma. "Michael don't neglect your sister."

"I can't reach under her in this position," Michael said.

"I told you this was stupid," Chastity said.

"Shut up, slut," Michael said and slapped Chastity's ass so hard it left a hand mark on the cheek, "Take it like a good sister."

Mary gasped but Tabitha held her back.

"Part of her...?" Mary asked.

"Yep," Tabitha said, then shrugged. "I don't get it, but then, Chastity doesn't wet herself every time she orgasms, either. Like you said, everyone's different."

Michael was really plowing his sister now. Chastity's face pushed uncomfortably into the cushions. Rather than using his sister's hips to steer her, Michael was now holding on to them like handrails. As if he might collapse without them. His breathing coming in great gulps.

"Is he getting close?" Chastity asked, "I'm getting close."

"Well, Michael? Are you?" Hope asked.

"Uh huh."

"Well, OK then. Answer your slut-sis when she asks you something," Hope said.

Michael reached his hand forward and found his big sister's large breast. "Holy fuck I love your big boobs," Michael said.

"That's why she's our Chas-titty," Tabitha said, giggling. Michael, spurred on by holding his sister's breast, began frantically driving in and out of his sister.

"Ohhhhhh YES!" Chastity cried, "Harder, dammit! No, not my tit, dummy. My pussy. Goddammit, give it to me."

"Ahhhh... Getting close," Michael said.

"About fucking time," Chastity said, "I've been waiting forever to burst. Now fill me up. Give it to me good. Give to meeeeeee!"

Michael gasped, then roared. "I... I'm doing it, sis. I'm stuffing you full!"

Chastity was clearly cumming with her brother. Her mouth open in a silent O. Her head tilted to the sky. They both seemed locked in that moment, frozen in their ecstasy. Then it cracked and they both fell back. Michael bent on the ground. His sperm dripped down his sister's leg.

"Oh!" Tabitha said, "I'll get that." She reached with a tissue and scooped up Michael's spend. Michael stayed curled on the ground. Chastity stood up on shaky legs. Hope helped hold her up, and the two of them slowly made their way back to the bathroom.

Mary looked at what her life had become and sighed. Well, she thought, at least that ought to hold them for a while.

*