Thorough Examination

AJ was not prepared for this to feel so… good!? No, good was an understatement. Ecstatic or blissful would've been more accurate.

Every single doubt and fear she had about this entire situation vanished, and she even let out a loud decadent moan.

"Looks like there's some increased sensitivity back there," Mistress said. "Tell me how it feels, darling."

'It's… It's… Oh God, it feels magical. I've never felt so good before."

"And this is only with a finger. I haven't even reached your prostate yet." She bent down until her head was beside AJ's, and whispered, "can you imagine how much better it would feel if it was a huge cock stretching you out."

AJ froze, feeling her cheeks burning. It was hard to think, with her asshole twitching pleasurably around Mistress' finger, but images of big veiny cocks still managed to slither into her mind.

"I've never… I don't…"

"You've never been fucked in the ass before?"

"I'm straight," AJ mumbled, already realizing that she wasn't sure anymore what her sexuality was. Hell, she hadn't even thought to ask the Doctor if there was a way to revert the gender transformation. Maybe she didn't mind being a girl? Maybe she actually felt more herself in this gorgeous body than she'd ever did in twenty-plus years as a boy?

At the very least, she was now a lesbian.

"Are you sure about that?" Mistress asked, pushing her finger deeper. "The Elixir tends to make people more... open with their sexuality."

A second finger went in. The stretching sensation made AJ feel entranced, and she even began moving her hips back and forth.

"Tuh-tuh-tuh, no moving, darling."

She pulled out her fingers, leaving AJ's hole dejectedly empty.

"N-No! Please continue the test! I'll be good!"

"I will, I will. Once you stop moving. For the experiment to be conclusive, you can't be moving your butt around like some cheap whore; You gotta let me take control… Understood?"

"Yes Mistress."

"Good girl."

AJ's tiny dick twitched upon hearing those words. It twitched even harder when Mistress pushed her fingers back in.

"Ooooh, feels sooo good!"

"I can see that. Anal stimulation seems to induce copious amounts of precum leakage."

Her other hand grabbed onto AJ's dick, and she stuck a finger beneath her foreskin to rub the leaking head.

Getting her dick touched felt good, but not as much as she'd expected. A beautiful woman was touching her dick, and that thought alone made her quiver, but the touch itself felt kinda numb. Maybe it was because the sensation in her rectum was so wildly decadent that everything else seemed dull in comparison. What had the Elixir done to her?

When Mistress took her hands off AJ's dick, her fingers moved onto AJ's lips.

Surprised, she opened her mouth to protest, which allowed Mistress to place her precum-stained fingers against her tongue.

"Do you like the taste of your own juice, darling?"

AJ was being made to taste her own salty precum. But Mistress was so gorgeous, and smart, and she was fingering her ass, and AJ really wanted her to push her fingers further. She wrapped her lips around the fingers and nodded.

"Good girl."

She did her best not to move, but it was difficult considering how excited she was.

And then Mistress's fingers brushed against her prostate.

AJ trembled from head to toe and moaned against the fingers in her mouth. Feeling Mistress' digits against her p-spot felt incredible, even better than simply having her fingers in her rectum.

"Looks like we found it," Mistress teased.

She touched it again, and again, and everytime AJ spasmed in delight.

When Mistress' fingers pushed against it and stayed in place, AJ thought she might just die from the pleasure.

"I'm going to start rubbing it n-"

AJ howled as she came, spurting out a weak dribble of jizz from her still soft dicklet.

"I haven't even started rubbing and you already came," Mistress said. "Impressive."

AJ didn't hear any of that. Her mind was overtaken by the wave of pleasure from her anal orgasm, and all she could think about was to feel more of this.