To see if she'll give your ass some more attention

When she played with your asshole as she sucked you...man, that felt incredible. It was exciting, like nothing you've ever done before. "Hey, what you were doing with my...uh..." you try.

She just looks up at you for a moment, then says sweetly, "your asshole?"

"Um, yeah," you say.

"Sure," she says without you even asking. "Just sit back a little further." You recline and expose your ass a bit more, and she pulls up your shaft and balls. Her head descends, and you feel her dark hair tickle your buttocks and then the softness of her tongue on your ass. She rims you gently, and you hum softly at the pleasant sensation. She graduates to prodding your sphincter with her tongue, and then it suddenly slips inside you. You gasp at the strange feeling of something entering you, and she keeps tonguing you while she resumes stroking your cock. You're already hard again. She pulls back to lick a finger, and you stare into her eyes, transfixed. Callista pushes her middle finger up against your entrance, and it slips in, stinging you mildly. Oh, hell yes. You feel awesome as she starts to suck your balls. A finger up your virgin butt, a tongue on your ballsack, and a hand wrapped around your dick. You realize you can see her in the mirror at the side of the room, and you turn to watch her penetrating you. Your gaze drops to her oversized, bobbing dick, and the thought crosses your mind that she's way bigger than you are. Where did that come from? You are feeling overstimulated, and before you know it, you cum again intensely, your ass clenching on the invading finger.

"How was that?" Callista asks. You can only summon an unintelligible sound.