Change the setting a little bit.

Making any pregnancies reach nine months, and postponing the development for ten years seem unethical in so many ways. Not to mention, able to fertilize more ova when each intercourse is an intriguing concept. But if I have gone this far, I might as well make things more interesting.

I pause briefly to consider my options and then type down the following.

"Intercourse leads a woman's to conceive between ten to thirty offspring, and more ova gets fertilize with each ejaculation. Within a month, every ova will naturally develop to nine months. But...."

I know ten years is good, but who can wait that long? I delete that section, and type.

"Every woman's pregnancies will instantly reach nine months, unless the male who impregnate them wanted it ten years. Also, the male gets to decide when they go into labor. If they dont decide, the woman release more ova for fertilization, and the process repeat."

I gaze at a particular setting. Each woman will adapt to support their pregnancies, and no defect will occur. Since there's no harm when developing multiple offspring, I decide to add.

"There is no limit to amount of conception a woman's can have, and each babies will take a normal amount of space."

As I finish the setting, my sister enter the living room, and slouch on the sofa beside me. Jessica always does this when she needed something, or has something on her mind.

"What is it this time, Jess?" I ask, but still conspicuous of her behavior.

Jessica sprout sadly at me and say, "Well, there's a special promotion going on at Forever 21, and everything fifty percent off. There's a lovely dress I have my eye on, but I don't have enough money to get it." She nuzzle against my body, and say, "Come on, bro. The sell going to end in three days. Can't you help me out with two hundred dollars?" Sensing my hesitation, she reassures me, "I pay you back. Promise..."

As you can tell, when it comes to my adorable little sister. I'm a sucker for spoiling her. Jessica's deep-blue-eyes sparkle elegantly each time her eyes gaze upon me, and her charming smile will melt anyone's heart, including myself. Yes, that how much affect she has on a person. Even if you walk pass by, and miss her innocent appearance- her seductive body will surely catch your attention.

"Sis, will you give me a few minutes to think about it?"

Don't get me wrong, but the price tag on the dress is three hundred dollars. I mean, you can get a similar dress at a thrift store for a fraction of the price. I don't get why some girls buy expensive clothing, and put themselves into debt. You can call me cheap if you want, but I say that's being smart.

Jessica gives a slight smile and say, "Take your time, big bro." She lean over to flaunt her cleavage, and whispers, "The dress will look so sexyyyyy on me. Every girl at prom will be so envious."

I made my way to my room, and sadistically grin. Sure, I can loan her the money, but I doubt she'll return it. This time, I won't be giving away my hard earn saving for nothing, and tape.

Every female at the age of eighteen will be on free-use, and providing full services. If any male asks for sex, they cannot refuse, even if the act is aggressive.

That was excellent. But when I think about it, this setting also affects my mother, and sister. And knowing they're pretty much sex on heels, everyone's in the city will be asking for services. On the side of precaution, I type.

"Family members take priority over others. Once sexual activities occur, they're no longer available, and they become a potential lover to the male's relative who impregnate them."

I gather the stash of money hidden under my rug, and return to the living room.

"Here the money." I say, but quickly shrink away, "Not so fast, sis. I need you to do me a favor."

Jessica raises an eyebrow, and say, "What kinda favor?"

This is the first time using the setting, and I'm not entirely sure if it will work. Nether-less, I'm determined to ravage my sister's alluring body.

I take a few deep breaths, and nervously say, "I want to have intercourse with you."

As Jessica heard my request, her body begins to shudders, and her mind flooded with indecent thoughts.

Jessica eagerly licks her lips, and advises, "I don't mind giving you my virginity, big brother. But you need to understand something important. I'll end up conceiving ten to thirty offspring each time you fill me up. Not to mention, I have to be your girlfriend, and continue to have sex with you. Are you certain about this?"

I'm amazed by Jessica's lack of resistance. Not just that, but she describes everything on the setting.

I grin from ear to ear, and say, "I'm positive about this, sis."

Jessica snatches the money from my hand, and say, "Well....my body all yours, big brother."

I remove her cheerleader uniform without hesitation, and swiftly devour her twins, "Your chest was flat as a board five years ago, and it's developing nicely." I say, while nibbling on her nipples, "Damn, it tastes good."

"Bro, take it easy." Jessica say, but the setting slightly tamper with her personality, "Never-mind, squeeze my breasts roughly, but try not to damage it too severely. Otherwise, I won't be able to feed the babies."

"You have no idea how long I dream of this moment." I say, and move in to kiss her tender lips.

Jessica giggle by my statement, and say, "You're such a pervert. I mean, it's not normal for brother to lust after his own sister. But I should have realized this sooner, considering my bra is missing from my room." She slid her index finger across my chest, and tease, "Well, what are you waiting for, big brother? Shove your dick in my tight virgin pussy, and knock me up."

There's no way in a million years will Jessica behave in this manner, nor will she suggest in a sweet, and loving voice to impregnate her. But with the setting, it's clearly evident that her pussy is making the decision.

I lay comfortably on the sofa, as Jessica slid her body on top of mine. Her fingers widen the entrance, then romp my entire member in one sweep.

Jessica whimpers, as her hymen begins to stretch astray, "Ughhh..god that hurts."

Jessica leer at me with distorted expression, "There's goes my virginity, big bro." She say, as she begin to move her hips, "Is this what you have been lusting after, you sick freak?"

Thank god her personality isn't completely gone, and able to express displeasure. It'd be quite boring, if she's just telling me to impregnate her like a mindless zombie.

"Damn sis, you're one wet bitch. I bet your pussy is craving for my cum, huh?"

No longer feeling discomfort, Jessica hastens her moments, and reply, "Hush up, bro. You're probably enjoying this more than I do."

The tension from my tentacles begin to throb, and I know it's wrong to impregnate my my little sister.

"Sis, I'm, ughhh, almost there." I warn, while holding onto her hips.

Jessica sneer at me, and say, "I asked you earlier, if you're certain." She sadistically grin, "Well, you imbecile. You're not allowed to back out now." She demand, and grip my cock firmly in place with her slit, "We're going to keep fucking until we pass out from exhaustion."

There's something unusual about her expression. Her smile is mischievous, and her breathing indicates a deep yearning for a large pregnancy.

Curious about her strange behavior, I ask, "Sis, how many babies can we have?"

Jessica's virginal twitches, as an image of having countless babies stretching out her stomach enter her mind.

Jessica's fluid gush on my member, and utter, "God, your cock inside me feels so gooddd." She whimper a soft reply, "I'll probably end up with a dozen babies on our first try." She nibbles my ear and then whisper, "My pussy is freely available, and you can knock me up any time. Even if I end up with an obscure pregnancy."

"Damn sis, you're one crazy slut." I blurt.

Jessica's eyes fluster, "Oh god, big brother. If we keep this up, there's going to be so many ova geting fertilize."

Jessica orgasm blissfully again, as her ovaries randomly select twenty-three ova to release.

I for once, felt guilty for using her body for my own pleasure, and held off erupting my seed.

Jessica smile at me, and softy say, "I have a confession to make, Josh. I dream of having your raw cock inside my pussy." She purrr, "I'll do anything you ask, if you make me a mother."

I don't know if she's expressing her true feelings, or the setting affecting her emotions. One thing for sure certain, I'm about to spew any moment.

"Can we get married?" I joked.

Jessica brighten joyfully, and say, "I'll tell you what, big bro. If you keep fertilizing my ova for the next three months. When I finally give birth, and things settle down, we can tie the knot. Sound fair?"

I'm almost at my limit, but there's still time to withdraw. However, I delay this any longer and my inner demon will ruin my sister's future. With so many kids to raise, she'll likely drop out of college.

I girth my teeth, and shout, "Ah, fuck!!!" My body spasms, as my baby batter flood the entrance.

For the first week, I ravaged my sister's body in every position imaginable, and there's isn't a single place we haven't tried. The theater, pubic restroom, in the back alley. We even go far as to make out in our mother's room while she's sleeping.

I hand my sister a corset, and say, "Put this on, sis. I bet you'll look sexy in it."

Jessica rolls her eyes, and say, "Big bro, just look at my pregnancy. Do you seriously think it will fit?"

"Remember what you promise. If you ever disobey me, you'll run around naked in school?" I say, while grinning at her expression.

"B-but, I only made that promise to prove my faithfulness." Jessica mutter, then sigh, "Oh fine, I'll put it on."

As Jessica life up her arms to display her pregnancy, she say, "See, you retard. It won't fit properly."

For the next two month, I relentlessly release my seed into her canal, but never imagine it would show this soon. Still, having her stomach burgling out of proportion, and appear ready to give birth to triplets is rather arousing. Not to mention, her body is adapting marvelously. Her hips widen, and her legs more sturdy. The best part of all this is her butt. If I'm not mistaken, it plump up with an extra layer of cushion. The way she uses the weight to effectively engulf my member is overwhelming satisfying.

"Hey sis. At the moment, how many babies do you have?" I ask out of curiosity.

Jessica proudly smiles at the conception, and say, "I'm not entirely sure, but the size of my stomach indicates lot of babies, and the development is only two months." She reach into my pants, and gently caress my member, "And you know what, big bro? Two months is considered a baby bump." She move in, and whisper, "Of-course, it's going to be much larger, if we decide to fertilize more ova."

Knowing full-well my sister will do anything instructed, I say confidently, "Nice size for a baby bump." I twiddle my fingers, and ask, "How large will your pregnancy be, if I fertilize all your ova?"

Jessica laughs by my question, and say, "You didn't pay attention in heath class? When a woman's hit puberty, they carry about two-handed-thousand ova. Not to mention, you set each child to take a normal amount of space. I can give you an estimates, but it's better to use your imagination."

"Hmmmm....like a thousand time larger then it is now?" I said and Jessica giggle as she correct my assumption, "That's a pretty good estimate but we're dealing with two hundred thousand ova, and each one take space without restraint." She briefly pauses for a moment and then give her own estimate, "I think it's approximately ten thousand time larger." She sense my confusion and clarify, "It's basically similar to someone developing several thousands babies to maturity. But in my case, that's how large my stomach be in two months."

"Can I fertilize all your ova?" I ask while gazing at her recent pregnancies.

The app rewire Jessica's mind to accept my request.

"It's fine with me. But I must warn you, the pregnancies will be chaotic."

Knowing her mind is conflicted to some degree I asks, "Hey sis, can we mess up your stomach?"

"You mean...deliberately rupture my stomach like a balloon?" Jessica nervously asked.

I nod my head and says, "Yeah, can we do it?"

"I was hoping to get an abortion once you had your fun. " Jessica hesitated, but suddenly the app's temporary taken control of her body and says, "Disable the adapt protocol and your request will be fulfill."

I decided to amuse myself just to see her expression and temporary disabled the protocol.

Jessica glimmer brightly as she reply, "Sure, big bro. I'll make sure the pregnancies fuck up my stomach."

"That's awesome, sis. But how soon will your stomach burst?" I asked again for reassurance and she replies with an unconcern tone, "Since you disable the adaption setting. It can unexpectedly occur any day of the week."

That night, I didn't wast time fertilizing her ova. When three am approach, my sister warmly hug me, and say, "I love you, dear husband."

Her sudden comment startle me, and ask, "Ummm..why did you call me husband?"

As my sperm finally fertilize Jessica's last ova, she say, "It's all done, big bro." Suddenly her stomach rapidly expand, "Oh god, they're all developing at once."

I find her hurling a little disturbing, but knowing my swimmers feasting on her ova give me satisfactions.

"You did a great job knocking me up." Jessica say while smiling brightly by the after glow.

Jessica can feel her stomach convulse and say, "Bro, come here for a moment? There's something I need to show you."

I move in closer and ask, "Is something wrong with your pregnancies?"

Jessica giggle as she reply, "You wanted to mess up my stomach. Well....if we're lucky it might happen by tomorrow morning." She smile by my confusion, and encourage, "Squeeze it, bro. And you'll know what I mean."

I press my hands against her pregnancies to feel the vibration. When analyzing more closer I notices her stomach is expanding noticeably.

"Holy crap, Jessica. You're right about it being chaotic." I shout and yet, intrigued by the development, "Are you certain it'll happen by tomorrow morning?"

"I'm feeling extremely agitated already. So....it's a high possibility." Jessica replied and then her eyes roll upward as she aruge with the pregnancies, "Not even first term yet, and you guys are fighting. Can't you all work together, and slowly make room?"

Jessica gently rubs her stomach, and say, "It'll make mommy happy, if you treat each other nicely in there." She give off a stressful heave, "You ungrateful little wretch." She angrily dart her eyes at me. "You better take responsibility for my discomfort!!"

I laugh at Jessica's circumstances, but to be on the safe side, I type one final setting.

"The person who got their significant others pregnant can reset their pregnancy. If they don't decide, the adaption protocol will activate and the pregnancies will last wo years, and the person goes into labor."

This setting might be useful, considering I get to see how large her pregnancies will bloat. Then reset her pregnancy, and knock her up all over again.

"You ruin the fun, big bro. At least wait for tomorrow morning and than disables the adaption setting." Jessica said under the app's influence and continues to encourage, "Don't you think a fifty-fifty chance is exciting?"

I gazes at her suspiciously and asks, "Are you sure it's a fifty-fifty percent chance?"

Jessica giggle at my suspicion and says, "Well....if you need to know the precise estimate. It's more like sixty percent."

"Why did you lied to me?" I asked sternly and she nervously replies, "If I told you the truth, you wouldn't agree. Besides, I don't think ten percent more matters."

"Of course it matter." I aruged and explain my concerns, "The odd of your pregnancies failing are more likely to occur."

Jessica roll her eyes and says, "You're the one who wanted to mess up my stomach. I don't know why you're complaining."

I sighs at her statement and says, "Yeah but was caught in the moment, and didn't actually want to go through with it."

The app echo a suggestion in Jessica's mind and she says, "Why don't we let the App randomly select a percentage? That way, none of us knows the results until it happen."

I sighs at her pleads and says, "I'll think about it."