Keep fucking her mouth and her more.

You continue to **** your little sister, using her face like a cocksleeve while she tries to scream while **** around your cock.

Facefucking Vanessa is everything you dreamed it would ever be. You can't count the number of times you jacked off to her while you were still living in your parent's house, and to be fair, that never stopped. You never did find your shrew of a wife attractive in any way, you usually got off during sex by picturing other women whenever the two of you had sex, and your sister prominently featured in a lot of your fantasies.

And now here she was, on her knees before you, worshipping your cock with her mouth. For all her intelligence and talent and beauty, she was still little more than a fuckdoll for you to use any way you please. It didn't matter that she was better than you in every possible way. From now on, she was going to be your personal cum dump and nothing else.

You owned your little sister's mouth. With a victorious cry (just in your own head, it was really more of a sad little whimpering moan) you grab the back of her head and started shooting your wad straight into her stomach, pulling out of her throat halfway through as her contracting throat massages your sensitive member, painting her face with the rest of your load.

Your sister coughs weakly with deflating cock rests on her face, confused and disoriented.

"Uly... what- what is happening? Why can't I move? What did you do to me, you creepy fucking pervert?"

You smile down at your little sister. She is picture perfect. For the first time in your miserable life, you feel something resembling happiness. And all you had to do to achieve it was **** your prissy little sister's mouth. You wish you had done it sooner.

"Something I should have done a long time ago, little sister. And I'm nowhere near done. I have years of pent up energy I need to release on your smart little mouth, my sweet thing. You always thought you were better than me, too bad it didn't do you any good in the end. I'm going to fuck some respect into that brain of yours. In fact, we're going to start right now."

"No- no! Wait!! Stop! Mmmph!!"

Your cock isn't fully hard yet, but that doesn't stop you from guiding your sister's face back down to your crotch. Her protesting words are cut short as you sink your slowly growing member back into her cocksocket mouth. She starts to cry as she realizes that you're going to fuck her helpless little mouth again and that her ordeal is nowhere near being over.

The vibrations from her muffled protests sends pleasant tingles up your spine as you marvel at how nice this feels. It feels like home. This is where your cock belongs.

As you continue to use your little sister's mouth as a cocksleeve, enjoying the sound of her muffled screams and protests as you violate her mouth, a text box flashes before your eyes.

[Quest progress: Tutorial Quest #2: Vanessa Martinez submission score: 8]

Interesting. It looks like **** your little sister's mouth against her will isn't enough to significantly raise her submission score. You have plans to do quite a bit more than just fuck her mouth, but if that's all a face **** does, chances are, getting to a submission score of 80 in a month will require more than just **** someone repeatedly.

You ponder the thought as you continue to face **** your little sister as she gags and chokes on your member, then remember that you have someone who is quite literally the smartest person you know in real life in the same room with you. Maybe she can help?