While you are fucking Aaliyah, Brianna continues her story:
"He imagined in great detail the feeling of his cock's head sliding past my pussy lips..."
You pull out of Aaliyah and slowly push your cock past her pussy lips, feeling everything Brianna is telling you.
"And then he imagined his cock probing against the inside of my pussy, hunting for my g-spot..."
You follow along, using the tip of your cock against the upper inside of Aaliyah's pussy, hunting for her spongy g-spot...
"And then he imagined finding it, and bringing me to one shattering orgasm after another!"