Why not both?

"Can... Can I use both holes?" You ask cheekily.

"You can't go ass-to-vag. Health and safety." The officer says in her deadpan voice. "Once you're in her asshole, you need to finish there."

You nod. Sensible. But also, that means, that if you start with her pussy...

"I can try her pussy first, then her asshole." You confirm out loud.

"How astute of you." The officer says sarcastically.

You ignore the remark, and inch yourself forward so that your cock is aligned with her genitals. It's the perfect height. You could easily push into either hole.

As planned, you angle downwards a little, into her pussy, and begin to ease yourself inside.

The woman isn't particularly wet, so it's slow going at first. You have to do lots of tiny little thrusts to help coax your member inside without hurting either of you.

The officer shakes her head and tuts. "No foreplay, and not even spit for lube. How cruel."

"Hey! You could have said something if I was doing it wrong!"

"I didn't say you were doing it wrong. This is supposed to be a punishment, after all. Make it hurt for all I care."

That sends a shiver down your spine. How do you want to treat this woman? This is probably the one time in your life you could get away with being as rough as you like, without any consequences. Well, other than your own conscience.

For now, you decide to have, well, normal sex. This pussy is nice and tight, and gradually becoming slick with her natural secretions. It's making a perfectly pleasant fuckhole. Soon you are sliding most of the way in and out with ease.

Perhaps it's because this encounter feels so unique and special, or because you have an audience, but you feel a need to mix it up every now and then. You go slow, then fast, then slow and hard, and then all the way completely out and then all the way back in a few times. You've done that with Julia in this position a few times, and know what's coming.

It doesn't make it any less funny when it starts. Loud queefing sounds begin to erupt from her pussy each time your cock pulls out and pushes back in, as air becomes trapped and then escapes, over and over and over. You can't help but grin, and you hear some snickering from behind you. Immature, but harmless. You wonder if the woman on the other side of the wall can tell that she's queefing right now.

For the first time since you first penetrated her, you find yourself properly faced with a reminder that this is a real human being with feelings that you're fucking. You'd almost forgotten to consider her feelings at all. It was shockingly easy to just treat this butt like an object to be abused.

...Fuck, why does the thought of abusing this anonymous woman turn you on so much?! You must be more of a sadist than you realized.