"Slowly I'd take your cock deeper into my mouth, my wet lips running up and down your shaft, caressing your veiny flesh. "Could you stop yourself from cumming then?"
...
"Wow, look at you. That cock is ready to break out of those tight panties any second."
"Hmm, I guess I should give you something to do to ease that frustration, huh?"
She smiles wickedly...
"I know just the thing."