A brief electrical "encouragement" was enough to make poor Slut Harriet complete the sentence as ordered, despite her obvious fear about what her punishment might entail.
Fear isn't all that's obvious, though: "her" arousal is clearly pressing painfully against the studs inside the cruel device which encases those parts and hides them from view almost completely.
At this point, a large man walks in. Obviously taken aback by their presence, he seems satisfied with the redhead's calm direction: "This one's occupied, but you can use the hole in the bowl over there," gesturing to where the chained slavegirl remains patiently waiting in her assigned position.
"Well, girl, what do you think your punishment should be for using other people's property without permission?" One perfectly-manicured finger hovered menacingly over the remote control in her hand as she said this, making it very clear to poor Slut Harriet that she would have to think of something good, and quickly! Behind her, a soft metallic clanking and pained moans replaced the splashing and choking, making it clear the man had finished emptying his bladder into the helpless human urinal, and now seemed to be trying to "flush" her by pulling the chain.
As the kneeling slut thought frantically what to say next, another man entered. As soon as he saw the situation, he made a beeline for the other man and the captive he was using: he may have needed to pee, but not urgently enough to use a regular urinal instead of waiting to enjoy this one! The redhead smiled, obviously thinking that two heads would be better than one...