7 Days of Incest/Day 1/Hotdog her Ass/Blackmail Rose
"Remember that little incident involving pot and alcohol I bailed you out of a few months ago?" You grunt as you push her body up against your dick.
"Y...yeah...."She stutters, a confused mixture of emotion filling her voice.
"Tell anyone about this or make too much noise, and mom and dad will know all about how high on pot you were that day... not to mention the twelve boxes of it that you have stashed under your bed. That's more than enough to get in a whole LOT of trouble," Your words come out harsh, but they grab her attention and ensure her obedience as if you were holding a knife against her neck. She whimpers as you continue to hotdog her ass, increasing the pace with every thrust that you make.
"No more—" She quietly whimpers.
"Just shut the hell up and let me do whatever I want with you," You interrupt.
You flash an evil grin as you continue to pump between her ass cheeks, each thrust sending ripples of pleasure throughout your body. But you were not alone in your enjoyment; every thrust against your sister's asshole caused Rose to shiver with unwanted lust. Taking a much harder grip on Rose's hands than necessary, you began to pump faster and faster till the point where your dick burns with the friction, but so lost you are in your selfish pleasure that you don't care anymore. At the pace you were rubbing, it wasn't long at all before you felt the familiar tingling within your balls.
"Hope you're ready!" You shout.
"What?" Once again, Rose struggles in your arms, desperately trying to escape from your throbbing manhood. "Please! Don't—"
"Pot!" You whisper into her ear and Rose's body goes limp in an instant.
"Nh... nh... nh," Your little sister's low squeals accompany your final thrusts before you push your cock-head between her soft buttocks one last time.
"Ah... ah... awesome..." You gasp for air as a torrent of hot cum begins to spray from your dick, coating your glans with slippery warm residue and forming a thick, sticky glob that runs down Rose's ass crack until it reaches your stomach.
As you lean back with her still on top of you, your grip on her wrists loosens. Pulling away from you with tears in her eyes, Rose slides off your body and slumps to the ground in a heap, absentmindedly rubbing her wrists. She lays there in stunned silence, whimpering and shivering.