Influence Lily's mind.

You couldn't believe the influence actually made Lilly fall desperately in love you. Of course, you're not entirely sure why you received this marvelous gift, but you're going to misused it to ravish your sister's body. After all, you have been lusting after your older sister since puberty, and thoughout the years her body developed with an ample amount of curves. At some point in life you even place a hidden camera in her room just to see her naked. You know morally it's wrong to lust after your own sister, but the twisted desire was unbearable.

Lily retrieve a cellphone from the purse and then dial her fiancé number.

"Michael, you're a wonderful lover." Lily said while softly sobbing, "I know we're getting married in a week, but I wanted to call it off."

As Michael angrily shouted with disappointment Lilly muted the call, and when his frustration subsided she deleted the number.

Lily sat beside you while announcing, "Well, little brother. I'm officially available to be your girlfriend." She mildly laughs to eased the tension, "I can't believe Michael called me a worthless slut."

You felt a little guilty for menmepulating your older sister to break up the engagement and asks, "Ummm...aren't you sad?"

Lily realized your concern and reply honestly, "Leaving Michael does hurts, but having you as a lover fill in those empty void." Giggles, "I know a good way to lighten the atmosphere."

Lily seductively unbutton the blouses and then unstrap the bra. She smiles at your lustful expression and toss the bra toward you. Soon, she unzips the back lace of the shirt and slide it down her slender legs.

"Like what you see, little brother?" Lily mischievously smirks and you nod with anticipation, "Damn, your body are freaking amazing."

"The show isn't over," Lily winked while sliding the thong off, and then place it in your mouth, "Just stay quiet for a moment."

Lily suductively pose for your viewing pleasure, and you have to admit her profommance put most stripper to shame.

"Do you like my body, little brother?" Lily asked and your eyes roam freely to admire the views, "Like is an understatement. I could stare at your slutty body all day."

You had seen Lily's naked numerous times on camera, but nothing compare to the real thing. The breasts are large enough in proportion to squeeze, and there's a neatly trim pubic hair above the slit.

Lily plop on your lap and then grind her butt against your member.

Lily felt your erection and says, "I'm such a naughty slut. Why don't you spank my ass, little brother?"

Your left hand firmly grip your sister's butt while your right hand slaps several times.

"Damn, your butt bounce each time I slap it." You said with amazement and Lily weeps, "I'm a very bad girl, little brother. Spank me harderrrr!!!"

"Bad girls deserve to be punish," You said while forcefully assaulting her even further and Lily scream, "Yes, punish me like a proper bitch!!!"

"You have been dating Michael since middle school." You said while deliriously laughing, "I can't believe you actually broke up with him."

Lily affectionately gaze into your eyes and says, "I'll do anything to keep you happy, little brother. Even if it means leaving Michael."

Lily guide your hands toward her breasts and say with encouragement, "Squeeze the twins however you like, little brother."

You aggressively squeeze and Lilly's eyes rolled upward as she whimpers, "That hurts so good, little brother."

You deviously grinned at Lilly's discomfort and says, "The twins are nice, but I prefer to shove my cock in your needy cunt."

Lily smirked at your need for penetration and says, "I don't mind, little brother." Giggles, "Ater all, I'm your slutty girlfriend."

Lily kneel to unbuckle the belt and when your member come into view her eyes widen.

"Holy shit, little brother. Your cock are massive!!" Lily said and then withdraws a condom from the purse, "I know we're dating, but..." She roll the condom on your member and explain, "But I'm not on the pill."

Lily sighs at your disappointment and say, "Don't get me wrong. I do want children someday, but having them with you feels awkward."

You wanted the first sexual experience with your sister to be meaningful without obstacles ruining the excitement, but it appears Lilly's subconscious straggling to break free from the influences. You had taken a moment to think of a way to bypass your sister's resistance and came up with a conclusion.

"Lily, your body is my personal sex toy." You said while projecting the influences deeper into her subconscious, "You no longer have a choice, and allow anything to happen under any circumstances."

"No, my body isn't a sex toy!!!" Lily screamed while struggling to keep her mind from being menmepulated, but the attempts was futile, "My body belongs to my brother."

You're terrified the influences might cause some damage to your sister's mind and nervously asks, "Are you okay?"

Luckily, you set the first phrase to make her sister love you. Otherwise, she might have broken away from the influence.

Lily's headache momentarily subsided and calmly replied, "I'm fine, little bro." Giggles, "I don't know why I place a condom on you. I mean....this body belong to you."

You mischievously grins at your sister while saying, "Using a condom ruin the excitement."

Lily has a distinct feeling something wrong with your statement, but couldn't determine the reason due to the influence.

"You're right, little brother. Not using a condom does sound exciting." Lily said while rolling the condom off your member, "I'll trow away every condoms I had in the trash."

Lilly collect the condoms to flush it in the toilet and return a few minutes later to says, "This body is yours little brother. If you want to have intercourse without a rubber that's entirely your decision."

Lilly's subconscious still has knowledge of the situations and inform, "This body in the middle of ovulation." Giggles, "There's a good chance of it getting knocked up. Are you sure about this?"

"I want my first time to be special," You replied while sadistically grining at your sister, "I mean, the propose of intercourse are to pass down our genetics to the next generation. Right?"

"You're absolutely right, little brother." Lily agreed but then urge you against it, "However, this body basically has mom's and dad's chromosomes." Giggles, "It's going to be weird if your sperm fertilize the ova."

"Relax, the chance of birth defects are extremely low," You implores and Lily sighs at your ignorance while saying, "Don't take inbreeding lightly, little brother."

You finally got the chance to be intimate with your sister, but then remembered your mother had been trying to convince another child. Unfortunately, your father's sperms count are low and no amount of fertility will cange the result.

"You said earlier you'll do anything for me. Right?" You asked and Lily promptly replies, "Yes little brother, absolutely anything your heart desire."

"I wanted to spice things up a bit," You said while mischievously leering at your sister, "Mom has a bottle fertility pills in her dressing cabinet. Can you go get it?"

Lily made her way toward your parents room and then return to give you the bottle. You taken a moment to read the label, and it advise to only consume two pills every six hours.

You toss the bottle to your sister and says, "Lily, can you consume ten pills every hour?"

Lily read the label and blurt, "Little brother, your request are wayyyyyy....past the recommended dosage. Not to mention, this body healthy enough to conceive offspring without fertility pills. If we do this, it likely going to end up with triplets or possibly more."

"Why are you worried?" You asked but Lily nervously hastatate, and you reinforces the influence, "It's not even your body, remember?"

"Fine little brother," Lily said as she pop the lid open to consume pills.

"I can't believe you did it!!!" You cheered excitingly by the influence effectiveness, and then visualize her stomach getting larger with each passing months, "Umm, can you keep consuming the pills on a daily basis?"

"I could but the conceptions will be unpredictable," Lily explained and you say, "A little bit of mystery sound like fun."

"Are you giving this body get an abortion later?" Lily suspiciously glare at you while asking and you reply, "I wanted to take a chance getting the pregnancy to maturity."

"I'll instruct this body to resume development until it reaches maturity, but can't promise it'll be successful" Lily informed and you wickedly grins while saying, "You'll never know unless you try."

Lily roll her eyes at your carelessness and says, "Very well, little brother. I'll try getting the pregnancy to maturity, but don't blame me if someone terrible happens."

It not like you're actually going to make your sister go through with it, but you find the conversation rather intriguing, and decided to make her act out your perversion.

"I want an honest opinion. Let's say, I'm thinking of going through with the pregnancy, but another some part of me couldn't deal with the guilt. What should I do?"

"We could take it one month at a time. If the pregnancy isn't large enough for you, take a chance extending development an extra month. Of course, you can repeat this method until you decide for an abortion."

"I like your suggestion, but what if the pregnancy unexpectedly fail?" You asked gleefully and Lily replies, "If you don't monitor the development carefully. You got no one to blame but yourself."

"Man, there's absolutely nothing I can't make her do." You softly laughs under your breath.

Lily lens in closely to purrr, "Is there anything else you want me to do?"

You plunder for a moment to think of a way keep Lily to yourself and says, "Can you delete your social media page like Twitter and Facebook. Also, can you stop having guys as frinds and delete their phone numbers?"

"Aren't you being a little overprotective?" Lily amusingly laughs and you confess, "I don't want anyone between us."

"You don't need to worry, little brother." Lily giggle at your possessiveness and turn on her personal laptop to delete the media page, "There, all done."

When the tasks was completed Lily playfully push you on the bed and then promptly guild your member into her drenching tunnel.

"Let's get your sex toy pregnant before our parents return home." Lily mischievously smirks while vigorously swaying her hips, "This body literally screwed when the day is over."

"That body used to belong to you." You reminded and Lily maintain squeezing the member while saying, "At the moment, it's not my body. If it was, I wouldn't allow multiple conceptions."

As the intercourse resume for a few minutes you felt an unusual tension and asks, "Is that body a virgin?"

"I was saving my virginity until marriage," Lily informed while resumimg to straddles, "But it's no longer my body."

"If you're a virgin. Why do you keep condoms in your purse?" You asked out of curiosity and Lily giggle while replying, "Mom is paranoid I might get pregnant, and give me a few condoms in case of emergency."

Taking your sister's virginity without consent made your cock uncontrollably throbs, and you aggressively penetrate while holding on to savor the moment.

"I have been waiting forever to ravage your needy cunt, Lily." You informed while increasing the momentum, "And I can't believe we're doing this without a rubber."

Lily tilted her head by the sensation while saying, "I can feel your cock plaualating."

When Lily's orgasm subsided she ask, "Are you sure about this?" Giggles, "Once you cum in this needy cunt there's going to be a lot of conceptions."

"There's no way I'm pulling out," You said as the urge for release is approaching, "I'm about to spew any second you incest slut!!"

Lily lock her legs around you and say with encouragement, "Knock this body up with your spawn, little brother!!"

The thought of your swimmers feasting on your sister's unsuspecting ova set off andrildean, and with one final push you erupt in the depth of her fertile womb. Satisfied, you nest your cock inside for a moment before withdrawing, and then coated your sister's face with the remaining load.

Momentarily, Lily's ex fiancé called to apologize for the earlier outburst, but you have something sinister in mind and snap several photos of your sister's flooded with cum. When everything are situated, you instructed her to be cruel when answering the call.

"Michael, will you stop fucking bothering me?!!" Lily shouted and then sends her ex the photos, "Can't you see I'm trying to get knock up?"

"You dirty fucking slut!!" Michael said with disgust and swiftly hand up.

"I doubt Michael will forgive me this time," Lily reassured and you notice the argument must have tarnish her fragile heart, but your main concern was keeping any obstacle out of the way, and have selfishly succeeded.

Unexpectedly, Lily recover from the influence and asks with confusion, "Why are we naked?" She taste something better and panic, "Did you rape me?"

"How she managed to break away from the influence?" You wonder and then speculate, "Maybe some command are easier and other are a lot more difficult?"

You know your sister is going to scream and without much time to formulate a plain you temporarily disable her freewill.

"Lily, I'm going to ask a series of questions, and I need you to answer honestly. Why can't you accept me as a lover?"

"It's wrong for brother and sister to date each other. Especially, having children together." Lily replied in a soft monotone.

It appears your sister still loves you, but you need to find a way to unrestrict those boundaries.

"So...there's no possible way we can get married either?" You continue to asked and Lily replies, "I don't think it possible, little brother."

You're about to give up when a sadistic thought occurred.

"If I menmepulate the core of your subconscious to permanently fall desperately in love with me, and desire to have an excessive conceptions. Would that make you accept me as a lover?"

Lily pause for a moment and then reply, "Yes, that will make me accept you as a lover. However, you need to set the amount of multiple conceptions. Without one, I'll likely have dozens after dozens without any regard to my own health."

"Can I change my mind later on the conceptions?" You asked with anticipation and Lily replies, "That's acceptable."

"Lily, I need this instruction deep within your collective consciousness. You will fall deeply in love with me. Also, you have a pregnancy fetish with no limitation to the amount of conceptions. Of course, I might discourage you from having too many in the future, but you're not obligated to follow my request." You instructed Lily and then decided to test the last part, "So, what will you do if I request to reduce the conceptions?"

"I'll take your requests into consideration, but likely decides on having a severe conceptions." Lily audibly reply and you asks, "Will you attempt to get the pregnancy to maturity?"

"You made me have a pregnancy fetish. As a result, abortion are temporary disabled from my mind." Lily explained and you asks, "What if I request for you to get an abortion?"

"You need to wait for abortion to be restored in my subconscious. However, it might be too late when the option are available." Lily explained the situation and you says, "When I wake you up from this trance you'll be happy with the new desire. Also, attempt to develops the pregnancy to maturity, but you're completely fine if something happens along the way."

You release your sister from the trance and waited patiently for the result of the menmepulation.

"I feel strange all of a sudden." Lily said but suddenly lustfully leering at you, "Little brother, I want a large family. Will you help me accomplish it?"

"I could but isn't dangerous?" You chuckles at her sudden shift in behavior and Lily say with an unconcern, "Who fucking care?" She grimaces at your silence and says, "If you won't help me. There plenty of other guys who would."

"Alright, I'll shove my cock in your needy cunt." You give in to her demands while promptly inserting the member into birth canal and then sarcastically says, "It would be awesome if your stomach end up a beach ball by tomorrow morning."

"It might," Lily said while tracing her fingertips across your cheeks, "And I decided to accept the risks."

You grin at Lily's fabricated emotions and says, "What if the pregnancy only last a few months?"

"Wouldn't that be something to look forward to?" Lily amusingly giggle and then teasingly whispers, "You need to pump more cum in my needy cunt for that to happen, little brother."

"I'll keep filling your needy cunt if you reduce the conceptions." You said to test out the influence and Lily immediately says, "No fucking way, little brother. I'm aiming for an extremely large pregnancy."

"You exercise daily to keep yourself in shape," You said while imagining her firm abdomen bloating with out of proportion, and then sadistically ask, "Think you can get a palpable sizes in a week?"

Lily smirked at your request while saying, "I don't think it's possible unless I continously consume fertility pills for twenty-four hours." Giggles, "If things goes smoothly, a little bit of pre-cum is all you need to knock me up."

You mischievously grins at her suggestion and asks, "How long can you develop the pregnancy?"

"It depends how much stress my body can endure," Lily replied while deviously grinning, "But I'm certain the pregnancy will be massive if we trow percussion out the window."

"That sounds tempting, but there's too much risk involved." You said and Lily giggle while imploring, "You'll never know how large the pregnancy will be without risks," Giggles, "And if we're fortunate, the last stretch might make it larger."

You enjoyed your sister's shift in behavior and decided to return her to normal. However, something is preventing you from removing the vicious tendency for multiple conceptions. Did the influence made her act on impulses, or something else?