"My mouth."

"God, Master," Kelly says. "All I've wanted all day is a big, fat cock to suck. Please **** me to suck that beautiful, big cock of yours. I want to put my mouth and tongue all over you massive dick and balls."

You grin and nod. "Excellent choice, my slutty **** sister. Please get on your knees and bring my cock out into the open air."

Without hesitation, Kelly gets on her knees in front of you. She reaches for your pants and boxers and strips them away as quickly as possible. Her hand comes up and immediately starts to fondle your manhood. Her fingers and palm graze delicately at your hot dick.

She feels you up for a second, watching your dick in awe. Her eyes go wide and look up at you.

"This is the dick of my dreams," she says.

You chuckle. "You're so complimentary, Kels."

"No," she says. "I mean, like, I've been having these waking dreams where this huge dick just pops up out of nowhere and---"

"Kelly, please use that tongue of yours on my schlong instead of flapping it in the wind."

The next instant, she brings her hand to the base of your cock and grips it. Her tongue darts out and starts licking fervently at the head. Shivers as she tastes you and you moan at the manipulation of your dick.

"It even tastes like the cock from my fantasies," she says, mostly to herself.

"Pretty sure I said no talking. Please tongue my balls instead."

She brings her mouth down and lifts your cock up with her hand as she starts lapping at your testicles. Her tongue is thorough as she tries not to miss a single spot on your scrotum.

"There you go, Kels," you say with a moan. "Finally, you've found the position you were born to be in: on your knees with your tongue on my balls."

She glares up at you without a word as she continues to give your testes a tongue bath.

"Alright, now please get up here and blow me like the expert cocksucker you are."

She brings her head back up to your pecker and, in one swift motion, brings your cock into her mouth as far as she can. Your lips are almost touching your pelvis. Unfortunately, she's not able to take your whole cock in your mouth. She starts humming a little, making your cock vibrate.

You moan. "What's wrong, Kels? Have you never deep-throated a cock before?"

She ignores you and starts to bob her head slowly, lapping at the underside of your penis with every stroke. One of her hands grips the base of your dick as the other starts tickling and playing with your balls.

You gasp and moan. "Your mouth was made to constantly have cocks in it, my slutty **** sister."

You think about grabbing her head and forcing her cock down her throat. However, she picks up the pace, bobbing her head up and down your pole in a steady rhythm.

All this excitement has you ready to pop already. You gaze down at your sister as she continues to slobber all over your knob, blissfully unaware of your predicament.

You definitely need to cum. But what should you do? Cum down her throat? Pull out and give her a facial? Have her finish you off with her luscious tits? You can cum anywhere on, in, or around your sister's body. The choice is yours.