Go for it

Maybe it would be smarter to give Arya some time to adjust, but the twitching piece of meat in your pants makes a decision before your addled brain can catch up.

Emulating a scene straight out a porn video you watched a few weeks ago, you sink to your knees in front of Arya and submissively press your lips up against her bulge. You keep your gaze lifted to meet hers, an eager little tremor in your voice as you ask, "can I help you with that?"

You can see and even feel Arya's groin throb, her libido obviously fired up and ready to go. You can't help but notice that she looks somehow disappointed, almost angry as she looks at you though; by rushing things to this point so quickly; you've probably permanently tainted the way your sister will look at you from now on.

"Are you even interested in me? Or just my cock?" The tone in her voice is something you've never heard before, even during your most serious arguments...you've never picked up such a blatant lack of respect from her before.

Even as you open your mouth, trying to explain, maybe even backpedal a little, she cuts you off without hesitation. "That was rhetorical. You already made it clear that you're just after some dick! Well, here it is."

She undoes her shorts and lets them fall, then practically tears her panties off; they seemed a little insufficient for her uses anyway. Her massive and still-growing titanic schlong plunks free to land heavily on your face. Everything seems to stop as the throbbing meat pulses against your dazed face, the scent and heat of Arya's cock knocking you senseless as if you'd been hit with a club.

Thoughts of trying to 'fix' your image in Arya's eyes vanish as you whimper, rubbing your face on her monstrous cock as you kiss it in worship. Perhaps you'll regret how things have gone later...but for now, you've never been more turned on in your life.