"Listen, Sis. If my boyfriend can't have your asshole, you can't have my sucking," Jenny said.
"All right, all right! He can have it, damn it! Only you keep licking me off," Cheryl gasped.
Doug's cock developed more drools and moved in tighter against the blonde's never-fucked ass-door. Its oozings had her rear entrance well oiled and she expected to be poked through there at any second. Then she was surprised to hear Doug say he thought his dick should be stiffer.
"Suck my prick again, Jenny," he told her sister. "It's not quite hard enough yet."
"Mmmmssshhhh! Okay," Jenny agreed, swishing her mouth off Cheryl's cunt. "Just stick your dork out to me between her thighs, under her drippy slit here."
Doug dropped his hips a little lower against Cheryl's ass and she felt his long cock slide forward on the underside of her cunt. She stared down and saw the dick's bulb poke out past her patch of gold crotch-fur as the boy hunched it forward hard under her ass-cheeks. Her virgin crack started leaking faster from the hot pressure of the first cock ever to touch it, then it dripped even more when she saw Jenny lean her head forward and gobble the bloated bulb-end of Doug's large prod into her pretty, cuntlapping mouth, sucking on it for some time and making it super-solid.
"It's ready now, Doug," the brunette said. "You can cock Sis's back door fine with it. I'll keep the front one hot with my mouth."
Cheryl's guts knotted ticklishly when Doug's steely shaft skidded backward along her dribbling pussy's crease and her ass-crack again. The dick's knob then settled on her twitching bunghole tighter than before, scaring her. But her cunt was fizzing with thrills from Jenny's mouth again, and she so badly wanted that pleasure to go on that she felt better about having to take the first ass-fuck of her life.
Well, damn! At least my front hole's cherry is safe, she thought.
Then the dick was stretching her tight back entrance, the fat knob pushing in, making the ring of muscles strain wider and wider open the cock's inward thrusting remaining steady and slow.
"Uhhhh! OH! Jesus! That hole wasn't made to take a prick in!" Cheryl groaned.
"Maybe not," Doug said. "But it can learn to take one in, sure as hell, and like it! Isn't that so Jenny?" he asked the blonde's sister.
"Yeah! Just like mine did," the pussy-slurping brunette answered.
Still finger-fucking her own cunt, she gave Cheryl some helpful advice.
"Make the butt-fuck easy on yourself Sis," she said. "Act like you're trying to get a big turd out. The cock will slip right up your ass then."
Cheryl's asshole felt much more sexily sensitive to the shovings of Doug's price from the rear because Jenny's cunt-lickings had her so hot, so the blonde felt very much like trying the younger sister's suggestion. Pushing down hard with her guts, she felt the ring of her asshole's door go soft and begin to stretch around the knob of the dick there much more easily. The slow inward ramming actually felt good then, so she held her ass up and back so that Doug could shove the meat to it better. Churning deeper and deeper into her rectal channel, the whole shaft of the cock was buried there in a few seconds. Still being stretched in the butt more than she liked, but with Jenny's mouth working more and more thrills out of her pussy, the blonde girl enjoyed even this invasion from the rear. Moving her ass around in little circles she, soon found that she could get shocks up her rectum that were nearly as delicious as those in her snatch, and Doug was not even moving his prong yet, just letting it bake deep in her butt's tunnel.
"Imagine it! Oh, imagine it! A cock up my ass! I'm so ashamed!" the blonde girl moaned.
"You sure aren't imagining it, Sis," Jenny told her, giggling again. "It's the real thing. Nothing to be ashamed of, either. You have good capacity."
Jenny spoke to her boyfriend.
"Hump her back hole good now, Doug, honey," she said. "I think she's hotted up enough for it."
Cheryl knew Jenny was right about her. She rocked her hips sexily, all by herself, sliding her pussy up and down on Jenny's deep-sucking mouth. Everything felt wonderful to her. A cum was on the way, even if she was stuffed up the ass with prick. She wanted that gut-blast, and she started working to get it. Sometimes she hunched her arse back around the poling spear of meat there with her eyes closed, studying and enjoying the feel of it. But she liked it best staring down at the obscene way her sister was licking up into her split with such good slobbery and shocky results and the way the brunette was playing with her own cunt so lecherously.
"Uuuuh, uuuuh, uuuuh, uhhhh," the double-loved blonde grunted, hitching her hips more jerkingly between the boy's butt-stabbing cock and her sister's pussy-stabbing tongue.