Richard might be the family brains but Lizzie, bless her, had always better under pressure. She smirked and snaked her arm out, then pushed the little button on the knob of the bathroom door to lock it.
“I’m in here, Mom,” she said loudly. “Just having some trouble with breakfast. Too much pineapple, I think.”
“You’re not throwing up are you? Is it morning sickness? Are you pregnant?”
His sister rolled her eyes at him. “Why is that everybody’s first thought?” she whispered.
He shrugged, keeping quiet.
“No, Mom. I’m not pregnant.” Then Lizzie’s eyes took on an evil gleam. “At least… not yet anyway.”
His sister humped against him, driving herself further onto his cock. Somehow, despite his complete terror, he was still hard. He didn’t move as Lizzie humped up again and ground herself against him smoothly.
“You sure you’re all right, Lizzie? You sound funny.”
“Uh huh… I’m good.” Her lips pursed appreciatively as she carefully pumped herself fully on his shaft. Oh god, his sister was enjoying this.
“In fact, I think I’m feeling better already, Mom.”
“Good. Good. Where’s Richie, honey?”
“Oh, he’s around here somewhere.”
“Down at the beach?”
“Maybe.” Lizzie answered dully, losing focus as she silently fucked herself on him and her pleasure mounted. She hadn’t cum yet and she needed to get off desperately. Her little tongue slipped out to the corner of her mouth in concentration and the adorable sight made Richard groan softly.
“His bathing suit is right here on the floor, though.”
“Uh, he’s got more than one, Mom. He’s not running around naked, I promise.” Lizzie rolled her eyes and kept using her brother’s cock hungrily.
“I certainly hope not.”
Richard was going out of his mind. Jesus, this was insane. His sister was fucking him a dozen feet from our mother with less than two inches of pine door between them. There was more adrenaline in his bloodstream than water at this point. His fear and arousal twisted and piled on top of each other. He couldn’t hold out against it for long. He looked down at his sister.
Liz knew the signs by now.
“Don’t you dare,” she threatened softly, glaring up at him.
“Cum inside you? Not on the pill?” he whispered back.
“No, I mean cum before me. Of course, I’m on the pill.”
Their mother interrupted from outside. “You still okay, Lizzie? Were you talking to me?”
“Yeah, I’m okay.” his sister called back. “I was just… uh… just… practicing my wedding vows.”
Richard’s mouth fell open in amazement at his sister’s outrageous answer.
She grinned up at him but her own depravity got the best of her. She couldn’t hold it together and she burst into giggles. The laughing fit made her stop screwing herself up into him.
“You’re wicked,” he gasped quietly, taking over and thrusting gently in and out of her drooling, overheated little pussy.
“Marriage isn’t funny honey. I hope you’re taking this seriously.”
“Sorry, Mom. I am,” his sister sighed. She nibbled her lip for a moment and did some first rate thinking under the circumstances.
“Hey Mom? You know, there’s a whole bunch of stores down in town that are having some kind of sidewalk sale today. There’s tons of pretty sarongs and stuff. Why don’t you walk around down there for awhile while I get sorted out?”
“Well, I could use some more beach clothes. Sure you’re going to be okay?”
“Yeah,” Lizzie answer came as a moan as her brother pushed her legs up and hooked them over his shoulders. From this angle, he could just brush the bottom of his sister’s vagina again and from her eager nods he could tell it’s what she needed.
“Okay, I’ll be back in time for lunch. Hope you feel better.”
“Already… feeling… better,” Liz cooed as her brother sank fully inside her over and over. “Have fun, Mom.”
They continued quietly humping for another minute.
“Okay, she’s long gone now,” his sister looked up at him, “quit messing around. I need you to fuck me like you mean it. You’ve been cautious in my ass and I appreciate it but this is not my ass. I’ve missed having a guy just go crazy on top of me. Do it. Take me. Please.”
He bore down on her again and she groaned gratefully as he pistoned his full length in and out of her sucking wet depths.
“That’s it Scooter… uh huh… fuck your wicked… little sister. Ugh.”
“Sis…?” his telltale warning came again.
“Don’t you dare…”
“Brothers … come first,” he gasped apologetically.
“Not… what that means… bastard,” she complained as she quickly slid a hand down to her clit and started rubbing herself, racing to cum before he gave out.
He won again. He didn’t mean to. He tried to hold out. But being in his sister’s pussy for the first time and barely avoiding getting caught doing it and just looking down at her tiny tight young body twisting and wiggling beneath him – it was all too much.
He came. Fortunately, Lizzie was right behind him. He felt her insides squeezing him rhythmically and it was almost impossible but he managed to jerk himself out of her to let his cum jet up onto her belly and breasts. Ropes of thick, white semen crisscrossed her body by the time he was finished.
“Shower?” he looked down at her, still gasping.
“Definitely,” she snickered, admiring the sticky mess he’d made of her.
They stepped in and shampooed and soaped each other sloppily, laughing as they coated each other in lather. The giggling came to an abrupt stop when Lizzie turned her back to him and bent herself over at the waist.
“Up for more booty practice?” Lizzie looked back at him hopefully, “Believe it or not, I’m still a little frisky.”
“Hmmm… I think I need to recharge. My last orgasm was a doozy. But, if you want, I could…”
“You could what?” Her eyebrows knit together in a cute way.