Her face mask

You search through the bag, finding that her white blouse, black skirt, and pink satin bra and panties are already rather stained and crusty, clearly most of it having already been used by other men to wipe up the sex gunk from their man-meat. No thank you. Even the insides of her high heeled shoes look like they've been soiled.

In fact, it looks like it's pretty much all already well-used and a bit gross. That is, until you notice something folded up inside the chest pocket of her blouse.

"A face mask?" You ask curiously, as you pull it out. It's a black cloth re-usable one.

"Oh yeah, you've been stuck without Internet for a while, haven't you? Last week there was a huge outbreak on the rail network in this city. So the mayor has mandated masks on buses and trains again, for a while."

"So if she gets on a bus or train, she's going to have to wear this?"

"Yep."

Your cock twitches as an extra little sadistic thrill runs through you.

"Well, sorry honey, but it looks like this is the only clean thing left."

A couple of the other jurors gasp as you take the mask and wrap it around your junk, and begin essentially masturbating yourself into her mask. All those vaginal juices, and all that ass funk, and probably a little bit of cum, get smeared onto the inside of that mask.

You picture this poor anonymous woman stepping up onto a bus, being instructed to wear her mask, fishing it out of her blouse, and as the bus pulls away, making it too late to change her mind... Only then does she realize what she can smell, and what must have happened to this mask.

"So once I'm done with this, then she's free to go?" You ask.

"Not quite." The officer admits. "We can't release her while anyone else is in here, because it would breach all the privacy rules. You would see who she is, she would see who you are, and the soundproofing of that room would be compromised as well, so you might be able to converse with the other two women here. No, she'll have to wait until all twelve of you are done in here and have left."

Your cock feels incredible as you have another nasty idea.

"Then... Until then... Is there any rule to prevent me from... you know... keeping on wiping? While all that is happening?"

"Since she can't leave anyway, no, there's no time limit on your... 'wiping'." She admits.

That makes your cock grow full-on hard again. Not surprising, considering how long it's been since you last came. Your cock still has a lot of energy.

"Well then." You say, in a matter-of-fact sort of way.

And you start to use her mask as a mastorbatory aid, to bring yourself to your second orgasm of the day.