She tries to keep them both on edge.

Stace was ruthless throughout Brandi's shift. She ran the vibrators on low for long periods of time, and cranked them up to high at inopportune times, like when Brandi was helping a costumer or when she was standing close to one of her coworkers. But whenever it looked like Brandi was about to cum, or whenever Stace herself was about to cum, she switched it off for a while to let them cool down.

Brandi knew it must be frustrating for Stace, too, but it wouldn't be nearly as bad since she was in control. Brandi had edged herself before, when she wanted to extend a pleasant masturbation session--it was fun and titillating, but then she had known she would cum eventually. Whenever she wanted, in fact. And that was the situation Stace was in. Brandi, on the other hand had no control. She never knew when the vibrator would be switched to high, driving her closer and closer to orgasm, and she never knew when it would be switched off, leaving her frustrated and unsatisfied.

She tried to conceal her pleasure, both so that her coworkers and costumers wouldn't notice and in the vain hope that Stace would misread the situation and let the vibrator go to long, letting her cum. But Stace always seemed to know right when Brandi was on the brink.

Stace also seemed to be able to tell which costumers Brandi found attractive. One particularly handsome man, a tall black man with a the face of a male model, broad shoulders, and strong, muscular arms, came into the store toward the end of her shift, right after Brandi had been brought to the edge and left frustrated. The vibrator was off, but as soon as he reached the counter Stace switched it right back to it's highest setting.

"Mocha latte, please. Medium, iced." He said, his eyes drifting down and widening noticeably when he saw her rock-hard nipples through her see-through shirt.

"Mmmm," Brandi said, involuntarily. In one more second she would have the best orgasm of her life. Please, please Stace, just let me cum. The vibrator switched back off. "Uh...I'm sorry, what did you order?"

"I ordered a medium mocha latte, iced. Are you okay?"

"I'm, I'm fine. Just...it's been a long shift. Iced mocha, coming right up. That'll be 4.75."

Brandi rang him up, and started on his drink, as horny as she'd ever been in her life. Fantasizing about her handsome strong costumer leaping over the bar, bending her over and taking her from behind, filling her up with a big, thick cock and pounding furiously as she screamed in ecstasy.

Just as she had his drink made and was turning to hand it too him, the vibrator turned on full blast again.