"Tell me," she says, "what were you trying to imagine just now?"
You gulp, and say that you were imagining that her breasts were covered with something awful...
"And did that work for you? Did you imagine that my breasts were not soft and warm and ready to wrap around your hard, throbbing cock, and bring you to the edge of orgasm? Did you imagine that?"
No, you swallow hard. Now you can't think of anything else!
"Or did you imagine how wonderful my lips would feel as I kissed your cock's tip while enveloping the shaft between my lovely breasts?"
God no! You beg her to please stop putting such ideas in your head!