Her finger

Still standing with her ass facing the full-length mirror, she turned her head to look over her left shoulder. Jordyn teased her clit with her right hand and gently caressed her asshole with the other. She let the tip of her index finger press firmly against the hole. "Nope," she said aloud, "gonna need lube!" Jordyn brought her finger to her mouth, sucked on it slowly, getting it nice and sloppy wet, then moved it back to her little pink pucker, circling it with the wet fingertip as she sighed happily. At the same time, she pressed the palm of her right hand hard against her pussy mound, enveloping her clit, and let her fingers play in the sticky opening of her slit. Okay, she thought. Here goes!

She gently inserted the wet tip of her finger into her asshole.

"Ohhhhhhh," she moaned. Her mouth pulled open, her eyes went glassy, and a thin sheen of sweat formed on her smooth brow. She rubbed her right hand hard against her clit and kept pushing her ass-finger deeper, gently yet insistently, until her first knuckle was all the way inside her.

Jordyn's asshole pulsed and twitched in an unfamiliar way. It also burned a little, though not unpleasantly. Need more lube, she thought. Her eyes moved up to meet the eyes of her mirror self and she smiled. "Hey there, do you have your finger in your butt?" She put on a slightly deeper voice to reply: "Why, yes I do, thanks for asking!"

Slowly bringing her finger out of her ass, she held it up to her face. She had been a little afraid that it would be unpleasantly dirty, but nope: it looked just like a finger, nothing more. Jordyn hesitated. It was one thing to put her finger in her ass, it was quite another to lube it up with her mouth after it had been in her ass. She cautiously brought it to her nose and sniffed. There was an odor, not unpleasant, that reminded her of burnt almond.

"Oh, fuck it," she whispered, and popped the finger into her mouth.