A test

I reached into the cabinet and took out a urinalysis cup and opened it. Her lip quivered as she realized it’d been two weeks already since her last **** test.

“Lacy, I’m clean, I swear.” She said.

She’d already challenged me about what she could keep on her body and the handcuffs so I laid out a final warning that I hoped I wouldn’t have to follow through on. I uncuffed her and she rubbed her wrists and though she looked appreciative I felt like we were losing ground in her ability to follow instructions.

“Do I need you to get your hairbrush? I haven’t had to spank you in quite some time but don’t doubt that I will.”

“Lacy, please...” she sobbed but couldn’t say anymore.

“Lucy, I love you but I’m in charge and when you challenge my authority like this it makes me wonder in what other ways you’re challenging my authority. I don’t want to have to come up more rules or more punishments. After this I’m going to need you to get your hairbrush.”

My nude twin slumped her shoulders and lost any fight she had left. She instinctively rubbed her bottom in anticipation of her spanking and she looked adorable if not a little pathetic. On top of that each soothing breath she tried to take for herself seemed to make her breasts shake and I suppressed a giggle as I knew it would destroy her.

I took the cup and put it on the ground in front of my naked sister and she squatted down. As she squatted she spread her slender legs and dainty feet, that matched my own. Spreading her legs made her vaginal lips part slightly as I watched her the whole time. She averted her eyes from watching my own as it served to only remind her of the power differential between us. She took a deep breath and let a small stream of yellow urine flow slowly filling the cup. I watched her the whole time to make sure she didn’t try to mess with the sample in any way. This was one of the hardest parts of her punishment for both of us. Her having to pee while being watched like an animal and me resisting acting on my own arousal. I know that sounds callous but it was really difficult to not act on my own fantasies while watching my duplicate live them.

“Thank you for cooperating. You’ve shown so much improvement.”

To my surprise she actually responded still squatting down.

“I’m really trying, Lacy. Do you tell mom how good I’ve been? Does she know?”

I could tell she really cared that her improved behavior was being noticed.

I handed her some bathroom tissue to wipe herself which she did and then placed it in a waste basket nearby. I tried to assure we were noticing her progress.

“Of course! I tell mom how good you’ve been whenever we talk. She’s thinking that if you keep this up you can wear a bathing suit at our graduation party. Just hang out at or near the pool the whole time and no one will question it.”

Her eyes shot wide open as I could tell she was afraid of whatever the alternative might be. Plus she was probably disappointed to hear that any type of relief was months away.

“And if I make a mistake...?”

I realized what kind of threats I could make but tried to put her mind at ease, at least slightly.

“If you do, you won’t get a graduation party. It’ll just be mine and you’ll stay naked but hidden in the house. Unless it’s a big mistake...”

She swallowed deeply as I took the cup from between her legs. I watched the various markers on the cup change to green on each **** that it tested for which indicated she was in fact clean.

I offered her a hand to help her stand back up. She took it and stood and I looked at her as essentially my nude reflection except I had a calm face and she looked a bit sad. She knew what was next but couldn’t bring herself to do anything until I commanded it. I did the worst parts last to build her up to it but as soon as I started poking and prodding she usually got pretty upset.

“Shake out your hair.” She did as commanded and nothing came out though nothing came out her various bits jiggled much to my amusement.

Usually I’d allow her to lift her own breasts but since she had challenged me a bit today I lifted them by her nipples without warning causing her to take a deep sigh. Again I found nothing there but held them a little longer than necessary and she blushed as I felt her nipples harden between my fingers. If she gave me any back talk at this point I might have to give them a slight twist but she just looked down to her side so I released her breasts.

“Open your mouth.” I said and she did. I took out my phone and shined the flashlight into it. I didn’t see anything but I reached my finger in and under her tongue to just be sure which made her avert her eyes again. I withdrew my finger and she knew all that was left was me feeling around inside her.

“It’s that time.” I said knowing how awkward it was for her and somewhat for me. She went to bend over her dresser revealing all of her ass and a hint of her pussy lips and I was very impressed she didn’t give me any trouble. I might be able to give her a lighter spanking after this since this was usually where I got the most flack.

Well, at least if I didn’t find anything.