Involuntary Orgasm

"No problem," you respond as you click the place order button, "Looks like the ETA says in about 30 minutes, hopefully it gets her sooner than that!"

"Sure hope - oh - so," Sabrina says, her eyes fluttering closed as the vibrator increases in strength yet again.

"Are you sure you're okay?" you ask in pretend concern.

"I'm totally fin----ahh," Sabrina gasps, and then closes her mouth abruptly to stifle the moan. Her hands shoot down to grip her knees. Her face reddens quickly and her legs shake involuntarily. Her eyes are wide open in shock as an orgasm washes over her. You take a step back in pretend surprise as you watch in delight as Sabrina tries her best to hide her climax. She does a pretty good job of it, her hands holding her knees to stop them from shaking too much. She bites her lip so hard you're surprised she hasn't cut them and her upper body goes as rigid as a statue as she looks at you in a state of embarrassment, shock and confusion.

"Um Sabrina was that what I think it was?" you ask, allowing a smirk to cross your face.

Sabrina's mouth now opens and nothing comes out for a second. Then she stammers, "N-no, I mean, um, what did you think that was?" Her face is blushing furiously now as she tries to get back in control.

"Oh okay," you reply in a teasing voice, "I thought you may have had some sort of pleasurable experience. I didn't know if that was cause of me or..."

"John!" Sabrina whispers, "That wasn't that. Whatever you are thinking."

"Ok, ok," you say, holding up your hands, "It's fine, I was just wondering and surprised, that's all. I'll leave you be and let you know when the food is here. Don't get too carried away in the meantime." You wink at Sabrina as you turn to leave. You didn't think it was possible, but Sabrina blushes even more at this.