You get on the bed

In a daze, you follow Arya into your room. You can hardly believe this is happening; your fantasies of being fucked by a dominant futanari are being fulfilled, but not in a way you'd ever have expected.

As you and Arya turn to face each other, you get the feeling she's got at least some of the same 'disbelief'. Once she catches you looking though, Arya scowls, resentment bubbling up on her face as she gestures to the corner of your room. "What are you looking at? Get on the bed."

A little shiver of humiliation runs through you as you walk over to your bed, sitting on it while your pulse races. You keep your gaze lowered, unable to meet your sister's eyes. Arya approaches you slowly, her cock swaying back and forth in front of you. As you stare, mesmerized by the 'snake' in front of you, Arya grabs your hair, pulling your face right up against her increasingly swollen groin.

"You look like you're going to faint from excitement." You can't see Arya's expression, but the sharp tone in her voice makes it clear that she's not going to go easy on her 'dependable older brother' for turning out to be such a cock-starved slut.

You don't get to savor the humiliating yet irresistible sensation of Arya rubbing her dick on your face for long though; she pushes you back onto your bed, following it up with the all-to-clear order to, "get on all fours."

Shaking a little from excitement, you obey without hesitation, getting onto your hands and knees, with your exposed and freshly prepared asshole pointed directly in Arya's direction.

The response is...explosive. Arya is on you in an instant, an almost animalistic growl escaping her lips as the mix of resentment, disappointment and arousal overtake her. You feel her soft - though surprisingly strong - body mount you from behind, the feeling of her well-shaped feminine form something almost any man would enjoy.

The much less feminine presence poking your defenseless anus takes up most of your attention though. As Arya's tip prods your well-lubed sphincter, you can feel the heat of her arousal...the realization that she's gotten so hard thinking of using your ass makes you more excited then ever.