First her mouth, then her pussy

Without breaking your stride, you step forward and sink your cock between your mother's lips.

She manages to fit most of your length without any resistance; she's had plenty of practice since you and Cassidy came of age. Gripping her head with both hands, you push the rest of your member inside inch by inch.

"Deeper... Deeper... Uuunngh," you moan as your cockhead pops into Mom's throat. "...There we go..."

As you slowly begin to thrust in and out of your mother's tight passage, you glance over at Dad. He's watching the action restlessly: the hand that was groping his wife just moments ago is now drumming uselessly on his leg, and you can see a bulge forming in the crotch of his dress pants. That bulge is a regular sight these days, and you're well aware that your father has a bigger dick than you or Cassidy... Not that it does him much good.

You look back down at your mother, who meets your gaze. The look in her eyes is somewhere between apathy and satisfaction... Pretty much the same expression she wears when she's doing the dishes or folding your laundry.

"I think I'm getting soft, Mom."

She furrows her brow in confusion; the feeling of your rock-hard girth stretching out her throat must make the lie pretty hard to believe. "Ggmph?"

"Yep, I'm definitely not gonna pump out much medicine if we keep going like this... Guess I can't give you a dose this morning--"

"Mm-mmph! Mm pphh," she sputters around your cock.

You look at Dad and shrug, hands still locked around your mother as you pump into her face. "What the hell does 'mm pphh' mean?"

"Why don't you stop, uh... That... And find out? Your mother has a right to speak," Dad snaps, even as he shifts position to relieve the tightness in his pants.

"Good call," you grunt, pulling out and holding Mom's head just inches from your erection. A few strands of spit and pre-cum connect its swollen head to her wet, glistening lips; as she takes a deep breath, one of them falls free and splatters onto her cleavage.

"My pussy," she gasps, flicking more of the sticky mess away with her tongue. "I need my medicine... Do what you have to." Mom looks to her husband for reassurance, and he jerks his head in a curt little nod, which she then mimics. "...That's the right thing to do."

"Well... Okay, if you say so," you reply, feigning indifference as you finally release your grip on Mom's head. Then you lean down over her sitting form, letting your cock slap against the top of her breast as you go. Taking hold of her legs, you give her a sudden tug.

"Aah! Hey!" She scrambles for support as her sizeable rear end slides off the couch and drops onto the floor with a thud.

"Marcus, what're you--"

"What does it look like, Dad?" You don't even look at him, focusing on your mother's body: she's lying on the carpet with her head up against the couch, hair disheveled and nightgown askew. One of her heavy breasts has slipped free, the nipple beginning to harden in the cool morning air. "I'm just doing what she asked," you continue, placing a hand on each thigh and spreading them apart. "Gotta give Mom her medicine..."

"Uh... O-okay," your father stutters, standing up quickly. "Time to go to work," he says loudly, adjusting his pants so that the full-on erection he's sporting slips down one leg. It's still completely obvious, and it causes him to limp as he heads for the door. "I don't need to see this part," he mutters, before disappearing around the corner.

"Bye, deeeaaaOOH," Mom yelps as you rub your cock against her bare slit. For a woman casually taking her medicine, she's surprisingly wet... Maybe her foreplay with Dad got her excited, or maybe it was deepthroating you. The thick layer spit on your cock isn't hurting matters either.

"There we go," you gasp as you slip inside, letting yourself sink into her soft body as her warm insides envelop your shaft. "Mmm... That feels good, Mom. Really fuckin' good..."

"Language, b-buuh--Baby... Oh, that's--Ah! Aaah!" She lets out a shriek as you begin pumping into her, your thighs slapping against hers with every stroke. Soon you're pounding her into the floor hard and fast, making such a racket that you barely hear the front door slamming.

Looks like I scared Dad off, you think. Good thing, too. I'm not sure he'd let me get away with what happens next.