She wants to dominate you

You feel an unexpected tightness around the base of your cock. Looking down, you see an impression circling your shaft, like she's given you an invisible cock ring. She taps the screen again and you feel a similar sensation around the top of your ball sack. One more tap and you feel the same tightness on your dick again, just below the head. Sophia taps the screen a final time and all three phantom rings constrict, getting tighter. You breathe in sharply, but don't feel any pain, more of a deep throbbing. Your cock twitches insistently at the pleasure still running through it. Not being able to take any more, you reach down to grab your member.

Sophia slaps your hand and you recoil in surprise. She looks at you with a mischievous look that you've never seen before. "I'm in control now. Just sit back and let me take care of you..." You like the sound of that, so you lean back and try to avoid reaching for your crotch, closing your eyes. Soon enough you feel her soft fingers wrap around your cock. You moan openly at the pleasure. She grips you tightly, and the pressure grows. Instinctively, you jerk your hips upwards to try and generate stimulation. As soon as you do, Sophia loosens her grip and you find yourself humping air. "No, please..." you groan. "Please... touch..."

"Shh..." Sophia holds a finger to your lips and you reluctantly settle back down. "Remember, I'm in control. One more outburst like that and I'll have to punish you for not listening to me..." Punish? She's really getting into this. Playing along for now, you figure you can always ask her to stop if it gets too intense. You divert your focus to staying still, taking deep breaths. As you calm down, your friend says "That's better," and softly grabs your cock again.