Drop to your knees and blow

You kneel in front of her.
"Oh," she half moans. Her shaft bobs silently in front of you. You begin caressing it once more, this time sending one hand to explore her balls and the feminine slit beyond. She squirms under your touch as you kiss her shaft, up one side and down the other.
"Please," she whispers, and you oblige before she can say more. You slide your mouth along her shaft until you are at her head and then, after a moment's pause, you pull the head into your mouth.
She emits a gutteral noise, her legs shaking for a moment as she feels your mouth around her head for the first time. When you begin to lick her legs almost give out with each circle of your tongue.
"Oh, god, yes," she says, "Don't stop."
You tickle her urethra with your tongue and her slit with your finger at the same time and she shudders, humping at your mouth slightly. You pull back just long enough to smile at her and say, "Get ready," before sucking in as much of her comically oversized shaft as you can. It's a struggle but you manage to get almost a third of it into your mouth.
She almost, but not quite, collapses under the **** of pleasure. She grabs onto the railing at the top of the stairs and hangs on for dear life as you give her the first blowjob she's ever had.
It doesn't take more than a few minutes before her moans become louder and higher. "Oh, god"s are replaced with "Oh, fuck!"s and her legs support less and less of her weight until she he screaming at you not to stop. Your fingers fly in and out of her tight wet slit. Your mouth pistons back and forth on her cock.
Finally, you stop. She shudders for a moment as she realizes she's no longer in your mouth. She is panting. "No, she says, "Keep going."
"I think that's enough for now," you say. You give her head one last kiss and then stand up. "Come on, there's still more house for you to see."