Take Lily's throat.

You're not completely satisfied with your sister's lips and continue to assault her mouth with your cock. You sat comfortably on the couch staring at your sister in glee. Her soft lips surrounding your throbbing cock felt exquisite. Her technique is quite spectacular, but of course you speculate that your sister had a lot of practice with her fiancé, in order to build up the experience.

You smile wickedly seeing your sister sucking on your cock in a steady motion. "Your mouth feels so fucking good, sis. Can you, umm...shove my cock down your throat?"

Your sister hesitate briefly. "Ermm..I don't know, bro. I never deep throat anyone before, not even my fiancé. Your cocks is too big, I'm afraid it might tear up my..."

You quickly cut Lily short from resisting and focus your ability on her mind. You tamper her perspective and change it accordingly to your need. "You're a horny incest slut and you enjoy having your brother's cock down your throat. You don't care about the pain of my cock inflicting inside, but only concern about giving me pleasure." You release your control to see how strong your abilities affect your sister's fragile mind.

Her head violently sways left and right. Her eyes are completely shut, as new information injected into her subconsciousness. When your influence accomplishes overriding her perspective. Lily slowly open her eyes and smile widely.

"What you're requesting is naughty, little brother." She held your stiffening pole steadily and rapidly stroke it -up and down. "Having your large cock down my throat, sounds kinda fun." She winks.

Lily open her mouth widely to engulf your large manhood into her mouth. Then slowly cram it into her tight throat little by little, until your cock completely inside. The sound of your sister's struggle excites you exponentially. "Oomph, oomphh...." She aggressively chokes, but your influence eliminated her concern about the pain she's receiving. The view of her saliva mix with your per-cum together and dripping down her chin. Made your cock swell even harder.

You slide your fingers through her hair and held her head firmly. Then slam your cock more forcefully into her. "Ughh, god sis! My cock deep in your throat feels...." You move your hips rapidly, back and forth. Lily's eyes went wide, as she tries to maintain your aggressive abuse. "Feels so fucking good! Take my cock, you slut! I'm going to feed you my cum!" You shout loudly.

You ejaculate torrent after torrent of you spent up desire, directly in your sister's throat without remorse. You pull out satisfied and your sister collapse onto the floor. She repeatedly coughs in agony and her body shiver from your mistreatment.

You sisterly grin and upload the remaining sticky-white-cream on her innocent face.

The relationship aspect of growing up with your sister wasn't that great and you know she's getting married soon. You glare at you sister's luscious body. You're selfish needs won't allow her to be taken away from you. You can practically control Lily to do anything for you, but you wonder if you can can manipulate her feelings to be more affectionate? After all, you do need some emotional excitement with your sister. Other then having her mindlessly obeying your orders like a puppet.

You took a deep breath and concentrate your influence in her subconsciousness. "You're desperately in love with your little brother and will literally do anything to please him."

Moments later, Lily regained her composure and got to her feet. She looks deep into your eyes with admiration.

Lily plop on your onto your lap and playfully twirl her fingers around your hair strand. "Umm, little brother. I have a confession to make." Her face blush brightly. "I know this might sound awkward, but what I'm trying to say. Ermm... fuck it, take me bro! I love you so much! Not just a brother, but as a man I want to spend my entire life with."

Your hypothesis is correct, you can influence her emotions to be affectionate, not just the mind itself.

You play coy and asks your sister in a casual manner. "B-but sis. Aren't you engage and getting married in a week?"

She smile and move in to passionately kiss your on the lips. "I know little brother, but I love you so much! I'll do anything to keep you happy."

You grin mischievously and test out her desperation. "Hmmm. You'll do anything for me, huh? Will you call off the engagement and be my girlfriend instead?"

Lily quickly replied without hesitation. "Yes, yes, and yes little brother. I'll call it off and be your girlfriend!" She tightly embraces you and whisper softly in your ears. "We can even have, umm..sex too!"