Slightly

Jen pushed on your stomach and you quickly moved back allowing your dick to fall out of her mouth, "What the fuck John?" Jen said looking at you furiously,

"Jen lest you forget you need cum to actually survive. I need to go to work soon and it didn't look like you were gonna wake up anytime soon." You said with an easy smile,

"So you start mouth fucking me?" Jen shot back at you,

"Would you rather start going through withdrawals." You said looking at your little bitchy sister,

"Well...I guess not." Jen said thinking about it,

"Good." You said pushing your dick back into her mouth. Jen let out a surprised hum as you thrusted into her mouth deeply. You shifted forward so even more of your dick was able to slide into her mouth. Jen's eyes bulged out as you started to thrust even quicker and rougher into her mouth. Finally it happened your tip touched the back of her throat.

"God yes Jen." You sighed and quickly grabbed her head. Jen let out another surprised yelp as you started to throat fuck you little sister. You could feel your whole dick thick with your sister's saliva, you could even feel her spit dripping down your shaft onto your balls. You sister let out sweet **** sounds as your dick penetrated her tight throat. You felt your cum building and quickly slammed your length down her throat and held her head in place. You shot rope after rope of cum right down her throat while letting out loud moans of pleasure.

Finally satisfied you pulled your dick out of your sister's mouth and got off her bed. "That should keep you satisfied Jen, thanks." You said to your dazed sister,

"Y-yeah no problem." Jen said completely confused at what just really happened,

"See you after work." You said and walked out of her room leaving her to scratch her head and wonder how she let her brother throat her.