Get sucking, slut

Whatever escape plan might have been flashing through your brain evaporates as David towers over you. When had your son gotten so tall? Were his shoulders always that broad? Why do you feel so hot all of a sudden?

Slowly, without consciously willing it, you sink to your knees until your eyes are level with his crotch.

Dizzy with confused excitement, you watch wide-eyed as his erection sprang free from the cotton prison of his boxer's. Reflexively, you flinch away from the thrusting thing, but a firm guiding hand on the back of your head cuts off your retreat. "Oh crap, I'm really doing this!" you manage to think as your lips part and David's smooth cock head pushes into your mouth.

It's an overwhelming experience. The rich musk scent of him, the salt taste of him on your tongue, the sound of his deep wordless moans in your ears as you suck on him. Cautiously at first but with rapidly mounting enthusiasm, your newly acquired pussy pulsing with excitement, you take him as deep as you can manage until you gag on it. That seems to excite him more, and his fingers tangle in your long hair as he fucks your pretty young face.

You should be appalled to be used this way. Disgusted, even afraid, and those feelings are certainly there, but only as an undercurrent that contrasts with and adds to your overall excitement as he claims your whore mouth.

Maybe it's the surging hormones that come with Lilly's body, maybe it's your own forbidden desire bursting free, but there's no denying the simple fact that you love being his slut.

"Oh god, Lilly," he pants, his breath ragged, "I, I'm gonna... so close..."

You don't need him to finish that sentence to know what's about to happen. Without missing a beat, you pull your lips off him with a wet pop and warp your slender fingers around his thick shaft, while your free hand pulls down your top to expose an expanse of pale cleavage.

"Oh yeah baby" you coo, jerking him off with the benefit of long practice, "Don't hold back cum for me. Cum on my big slutty tits!"

He obliges with a hoarse groan spraying thick ropes cream across Lilly's chest making you gasp and giggle as his loses his load over your borrowed tits...