6 Times a Day

After a while, Xania could tell that Alan was getting close to cumming. But unlike before, she was keen to work with him to make the fun last. She pulled her lips off his prick and sat back on her heels.

She said in a sultry purr, "I think it's time I got completely naked. Don't you agree?"

Alan's heart was pounding hard, and he was fighting not to cum, so all he could do was nod.

With eyes only for him, she seductively finished removing her jacket, followed by her blouse and skirt, leaving her wearing nothing more than her glasses and high heels.

As she stripped, she said in a sultry tone, "Alan, you have a magnificent cock!" She hefted up her big boobs. "I think your cock needs to meet my tits. What do you think?"

Alan was all smiles. "Definitely!" Then he looked to Katherine. He panted and gasped, "That is... unless that bothers you, ah... Sis, or... makes you jealous... or something?" He said that fairly innocently. He was so overcome by pleasure that he hadn't been paying close attention to how much Xania had been goading his sister.

Katherine determinedly folded her arms under her rack again. "Me? Jealous? Ha! If anything, I'm getting all horny. Go for it, Big Bro." Steam was practically rising from her ears, she was so annoyed. But at the same time, she truly was getting extremely horny. However, she didn't want to give Xania the satisfaction of showing that either.

Xania got up and walked her sexy, bare ass to her desk to get some baby oil. Both siblings watched with awe as she sashayed her nude body across the room and back. Seeing Xania walk around completely naked only increased Katherine's aggravation that she was fully dressed.

Xania put extra oomph in swaying her hips and swinging and bouncing her big tits, mindful that all eyes were on her.

What neither Alan nor Katherine realized was that in her years as an aspiring actress in Hollywood, Xania had perfected a variety of different sexy walking styles. She was every bit as good at strutting and sashaying as Suzanne was when she put her mind to it. The effect was devastating. Alan thought he was already as aroused as he could be, but just seeing Xania sashay for a fraction of a minute set his heart racing to a nearly dangerous degree.

Katherine noticed Alan's jaw gape open as he continued to stare at Xania in wide wonder. She was suddenly filled with a powerful longing to learn to sashay like Xania or Suzanne (or Susan, for that matter, now that Susan had mastered the technique). Not for the first time, she was extremely frustrated that she had to compete for attention against such experienced and beautiful older women.

Then Xania got back on her knees in front of Alan, poured a copious amount of the baby oil into her deep cleavage, squeezed her tits together with her hands, held Alan's cock, and slipped it in between her tits for a titfuck.

Katherine thought, Fuuuuuck! She looks so sexy that it honestly makes me want to cry. Just look at her! She's soooo Alan-worthy! A body like that is built for just one thing, and that's fucking! What the hell is she doing being some kind of psychologist, even a sex therapist? She should be a fuck toy, serving my brother!

Shit. Did I really just say that?! I take it back. I don't want this long-tongued, big-titted competition on a regular basis!

By this time, Xania had begun a vigorous titfuck. When raising one round tit, she was lowering the other one, and vice versa, steadily repeating the motion over and over again.

Katherine thought, No fucking way! I know what this looks like with Mom's chest, or Aunt Suzy's chest, but here's a THIRD perfect rack that he's plowing through! He's such a fucking lucky fucker! That makes me seriously wish I had a penis. Okay, maybe not - that's too weird - but I sure do wish I could be feeling what he's feeling right now. Look at him, all blissed out with his eyes half closed and that silly grin on his face. Damn! I wish I had a rack like that. Hell, I can barely see any of his cock except for a little bit on the end. It's like he's drowning in boob!

Again, Alan tried to help Xania stimulate Katherine's jealousy, even if he didn't understand why. As he slid his rampant erection though her cleavage, he gasped, "God, Xania, that feels so good! I just love fucking every inch of you. But especially your huge hooters! These big babies are meant for fucking!"

Xania gave Katherine a significant look.

Katherine still insisted, "I don't mind and I don't care. So there!" She definitely wanted to take off her own clothes and join in, or at the very least pleasure herself, but she felt that would somehow mean she was approving and giving in.

Xania took it easy with the titfucking for a while, since she knew Alan was close to the edge. But after a bit, with her tits relatively still, she tilted her head down and stuck out her tongue.

"FUCK ME!" Katherine suddenly cried out in renewed agitation over just how long Xania's tongue was.

As she stared in disbelief, she thought, Crap! That's not a tongue; that's some kind of inhuman SNAKE coming out of her mouth! You know what? I think it's even LONGER than Aunt Suzy's! What the hell?! Were they bound together as college students by their freakishly long tongues? Actually, they probably were, but that doesn't help me now. Damn! That extra inch or two is crucial. More like two! She can slather his cockhead with ease even as she keeps sliding his cock around in a snug tit tunnel. I can't compete with that! Hell, nobody can!

Okay. I'm starting to get a bit jealous. (That was a dramatic understatement, since she was still in denial.) But I'm not gonna give her the satisfaction of knowing she got to me. Soon, this'll be over and we can go back home and everything'll get back to normal. Brother, please, just CUM already! You're killing me here! I don't know if I'm more horny or upset. But knowing his stamina, we're probably gonna be here for hours. Grrr!

Alan knew only that Xania had a long tongue, but he still had no clue as to just how remarkably long it was. He was so busy keeping his eyes shut to avoid being overwhelmed by all the stimulation that he missed seeing her tongue sometimes stretching all the way to his sweet spot. He just assumed she was really good at bending her neck forward.

He hadn't cum yet, although he was practically out of his mind from the constant stimulation. It was a bit cruel, but knowing that Katherine was steaming with jealousy yet pretending not to mind as he slid his stiffness through Xania's big rack somehow made his sexual pleasure that much more intense.

Xania was no unfeeling automaton through all of this. Her arousal was spiking, especially since she had a thing about being watched. Furthermore, trying to get a rise out of Katherine made the situation extra naughty. She was enjoying the titfuck, but what she really craved was to get royally fucked. She was close to the orgasmic edge and knew that would tip her over, probably multiple times.

So without asking Alan, Xania suddenly pulled him down to the floor, rolled over on top of him, and guided his cock deep into her pussy. She deftly accomplished all that in a matter of seconds. Alan was in such a euphoric erotic fog that not even he really knew what was happening until he was balls deep in her. (She wanted the fucking to be a done deal before anyone had a chance to object.)

Xania was so far gone into her fuck lust that she didn't even think about using a condom. That was highly unusual, because normally she was very careful about that kind of thing.

Nobody had really said anything in a while, except for Katherine's "FUCK ME!" outburst, but now Alan couldn't help but exclaim, "Oh man! Dang! Look, Sis! My cock just BOTTOMED OUT all the way inside Xania's hot twat! And man, is it hot! And tight! So tight! So good!"

Xania thought, Ditto! Phew! His thick shaft fits me so perfectly! Even better than the first time. I can already tell this is gonna be a fuck to remember!

With Alan's boner fully sheathed inside Xania's pussy, she churned her hips around in unexpected ways, mostly to show off to Katherine what she could do. She kept her hands behind her head, both to show off her physique and because the pose somehow made the fucking that much more enjoyable. Then she pulled back up until the tip of his dick was all that was still inside her. She kept the pose for a long moment, and then, as she stared right at Katherine, she squatted back down, impaling herself all over again with a desperate, erotic groan.

Katherine whimpered in frustration; she knew deep in her pussy just how fantastic that felt. She clutched her hands into tight fists and clenched her teeth. Give me strength, God! I will NOT give her the satisfaction of showing how much this is getting to me! But why does she have to keep her arms up like that?! It's cruel and unusual punishment! It's like she's having the time of her life, riding a bucking bronco, except she's riding my brother!

Xania shuddered and shivered all over as an intense orgasm ripped through her body. But she tried hard not to show it, and she was extra careful not to scream out. Hiding the climax actually went against her plan to rile Katherine, but she wasn't thinking clearly.

It didn't matter though, because Katherine definitely noticed. Shit, just look at that. God, she came so hard! I can tell! You'd think she'd stop and rest a minute, but no. Oh no! She's impaling herself on him AGAIN! Arrrgh! Kill me now! I'm so wet and horny wishing that was me, but there's NO WAY I'm gonna let her know that!

Somehow Xania still had the breath to ask, "What do you think now, Katherine? Does this make you jealous?" As she rode steadily atop Alan's engorged member, she luxuriated in the sensation of feeling his erection deep inside her warm, wanting pussy. She thought, I could definitely get used to this kid. Definitely! To think that Suzanne lives next door to this fucking machine. Lucky bitch! No wonder she's pulling this scam!

"No! I tell you, it doesn't!" Katherine almost yelled, with an angry face that was positively burning with envy. Then she had a disturbing realization. "And you're not wearing a condom, Brother! What's up with that?"

Xania responded, "He's not? You're right; he's not! Bareback fucking feels soooo good. But what's really incredible is that, Alan, you could knock me up today! Imagine that!" She figured mentioning that risk, while untrue, might spur him to even greater heights. She really was surprised and disturbed that she'd forgotten about the condom. Normally, she would have stopped to put one on immediately after being reminded, but she was so carried away by the fucking that she just told herself she'd do better next time.

Alan would have freaked out about the lack of the condom, but Xania surreptitiously winked at him, implying that she was just playing along to get a reaction from his sister. He decided she had to have some pregnancy protection of her own (which in fact was true, although she normally insisted on protection from STDs as well).

However, Xania didn't know about Katherine's enormous desire to have her brother impregnate her. That comment about getting knocked up was the straw that finally broke the camel's back. Suddenly, Katherine was so jealous that she couldn't deny it to herself anymore. She also was so upset that she was about to burst. She shouted angrily, "Stop, you two! Brother, don't cum inside her! Okay, I admit it! I'm jealous! VERY fucking jealous! If he's gonna knock anyone up with his potent baby-makers - and he will - it's gonna be ME! I wanna be the first to carry his children, dammit!"

She looked at Alan and wondered why he wasn't saying anything at all. He was trying to keep his face as neutral as he could, though it was hard for him not to let slip how much fun he was having.

Huffing and puffing, Xania said while she bounced up and down, "Don't be so stubborn. It's okay to admit some jealousy. Alan won't love you any less for it. By the way, you'll be glad to know that I've got my own protection and won't get pregnant. Also, feel free to take your clothes off if it makes you feel more comfortable." She kept on riding Alan's engorged pole in a most distracting manner, with her huge melons bouncing obscenely. She drove Alan's cock in and out while doing all the work herself, still twisting her hips in the same impressive way as before.

Katherine couldn't stop staring at where Xania and her brother were joined. It annoyed her immensely that Xania was making hip-grinding moves that she hadn't even known were physically possible. "Oh, okay, dammit! Not only am I jealous, I'll admit that I was feeling that way the whole time. But did you really have to go through all this just to get me to admit it?!"

"I suppose not," Xania admitted with a sly smile. She winked at Katherine, which only annoyed her even more.

Since Xania was riding Alan cowgirl style, she was doing all the work, not only rising up and down, but gyrating her hips in every direction. So far, Alan had just been lying there, reveling in the extreme pleasure. But after a while he decided to be more active. He reached up and grasped Xania's big tits with both hands, while simultaneously using his hips to help with the thrusting. As he enthusiastically kneaded her tit flesh he cried, "I'm in heaven! Total heaven!"

Even as their pounding continued, he enjoying running his hands all over Xania's incredible naked body. He especially liked alternating between grasping her bouncing tits and grasping her ass cheeks, sometimes helping her a bit with her hip gyrations. In between he would run his hands over her taut tummy. But mostly he just couldn't get enough of playing with her fantastic tits. Fuck me, man! I love this body! I must admit, my perfect body ideal is based on the very similar voluptuous shapes of Mom and Aunt Suzy. But Xania, she's like a fucking CLONE! She could be their lost identical triplet from the neck down! Too awesome! And I can tell she's loving it, so hopefully we'll be doing this more in the future!

Addressing Alan, Xania asked, "Do you have another one of those condoms? Unless you really are planning on making me pregnant, because my protection can only do so much to reduce the risk, and I am in my fertile phase." That last part wasn't true, but she wanted to tweak Katherine a little more. She winked at Alan, and then teased, "If you want to knock me up, I don't mind, but I think we should discuss it first."

"ANOTHER?" Katherine said hotly, in more ways than one. She finally began loosening her clothes and scooting ever closer. Hearing Xania talk about getting knocked up drove her over the edge of unabashed arousal.

Those comments also got Alan aroused beyond belief. He closed his eyes and concentrated all his energy on delaying his climax.

Xania thought to herself, Oops! But to Katherine she said, "I said that to see if it would get a rise out of you. It did. But it's also true. In my earlier session with Alan, I hadn't been talking to him for five minutes when I somehow found his cock in my hand. Such a clever kid! Of course, he just kept on taking advantage from there until he wound up fucking me in the cunt."

Katherine was pulling her clothes off frantically, eager to join in. "Very clever. I figured something like that must have happened. Brother is just insatiable, and unstoppable. That's one reason why I love being his fuck-toy sister. But now that you've gotten me to admit some jealousy, why do you have to continue having sex with him?"

"I'm also trying to help him reach his six-times-a-day quota."

"You're really the altruistic Mother Teresa of psychology!" Katherine said sarcastically. Then she added huffily, "But I can help him as much as you can, and do it much better, I'll have you know!" She tossed her shirt across the room.

"Fine then. Join in if you feel like it. I don't care. My point's been made. You're jealous and you go to absurd lengths to deny it."