When Alan awoke the next morning he found his mother's mouth already wrapped around his stiff dick.
His body surged to full awareness in a second or two. WHOA! Is that...?! NO! ... YES! AWESOME! He glanced down to see her lips steadily sliding up and down over his sweet spot.
His gasping sounds alerted Susan to the fact that he'd woken up. "I've come up with a new design for an alarm clock," she whispered gleefully in the darkness. "Do you like it? I call it the 'cock-hungry mother.'"
She'd pulled the top sheet completely off his bed. She lay on top of his legs, with her upper torso rising up and down over them in time to her sucking, just as if she were doing push-ups. She wore nothing but white panties, and at every downstroke her big bare tits pushed down onto the tops of his thighs.
Alan was speechless. He decided to stick with his "silence is golden" policy of not saying anything to avoid somehow screwing up. He just kicked back and fully enjoyed what she was doing. But he grunted and moaned loudly and often to let her know how much he was enjoying and appreciating her efforts.
Halfway through her tongue-vacuuming of his crotch, they heard Katherine open her door across the hall and walk a few feet down the hallway and into the bathroom, but even that didn't slow Susan's not-so-quiet tonguing. Given Susan's unthinking habit of making constant "Mmmm!" sounds during blowjobs, that was quite daring.
Alan thought to himself, Dang! Now that she's started, it seems she literally can't get enough of my dick! Not that I'm complaining, but who'd have figured my mom, of all people, would act like this? Damn! Fuck yeah! Every morning, to wake up like THIS. Sweet! I'm in heaven!
With Katherine making noises in the bathroom, Susan was soon forced to pull her mouth off and whisper, "Tiger, you have to be quiet now, you hear? We can't let Angel know that I'm in here."
"Okay, I'll try," he whispered back, even as she engulfed his cockhead again.
A few moments later, Susan picked up the pace, assaulting his erection with everything she had. She thought, I want his cum and I want it now! Her whole head bobbed up and down madly, her long brown hair flying and falling over everything. One hand grasped at his scrotum and the other wandered over his chest as if it was frantically searching for another dick to jack off.
Then Katherine knocked on Alan's door. "Brother? You in there? You can't oversleep again, you silly sleepyhead." She had to shout to be heard through his thick door.
"Um, I'm just getting up, Sis!" he shouted back.
Susan had paused when she heard the knock, but it didn't slow her down for long. She made it hard for Alan to string two words together coherently, the way she was licking and sucking. She tried to cut down on her "Mmmm"-ing, but she couldn't stop making rather loud slurping noises.
My goodness! Susan thought. With Angel at the door, I just HAVE to stop! But I CAN'T! This just feels so good and so right! And he needs it. I'm providing a medical service, hee-hee!
Katherine heard the warble and strain in Alan's voice. "You okay? You sound funny. Ooooh! I know what you're doing. You're not just getting up; you're getting IT up, aren't you?" She giggled.
"Um... Well..." He couldn't talk. He was practically cross-eyed because he was straining so hard not to cum. He looked down and saw Susan's head flying up and down wildly and felt her tongue doing indescribably wondrous things.
Katherine took his feeble failure to answer as confirmation. "A-ha!" Her voice changed, becoming softer and more tentative even as she spoke loudly to be heard. "Do you need some help? Maybe with some visual stimulation? Can I come in?"
"Um, no! I'm good! This is kind of, uh, private. Please?" He was sweating with nervousness and excitement.
"Well, geez. Here I am, practically offering to give you a sexy little striptease... Heck, I AM offering to give you a sexy little striptease. Wouldn't you like that?"
"UNH!" he grunted, more in response to what Susan's tongue was doing to his sweet spot than to what Katherine had said. "Oh GOD! YES!"
"Well then, can I come in?"
"Not... not... now!"
Katherine giggled. "Someone's right in the middle of spanking the monkey, isn't he? You can't even stop long enough to open the door?"
He groaned lustily, again mostly because of Susan's powerful suction and tongue action.
Katherine asked in an increasingly sultry voice, "Or are you afraid of Mom catching us if she found me dancing naked in your room?"
The irony of that comment was not lost on Alan, given where Susan was and what she was doing. He cried out, "Sis! You're embarrassing me!"
"Oops! Sorry. Okay then, see you downstairs. Sorry for interrupting."
Susan hadn't slowed a bit, not even when her daughter asked if she could come in. Susan knew that she and Alan were both close to climaxing, and she simply would not be denied.
Alan covered his mouth to muffle his loud groaning as he came. "Fuuuuuuuck!" he gasped, only partially managing to mute his voice.
A torrent of cum flew into Susan's mouth. Shivers of joy ran along her spine. Nothing in her whole life had ever felt as good as having all that incestuous cum flood down her throat.
She recovered more quickly than he did. Sitting up while still topless, she chided him, "Did I hear you say a naughty word? You know that's not allowed."
Alan's mind reeled. Her bared boobs are still friggin' bouncing in every direction and my cum is on her lips and dripping down her chin, yet she's after me for using the word 'fuck?' Fuuuuuccckkk. This new life is too weird for me to handle.
He chose to ignore her words and just said, "Mom, you were fantastic!"
She was all smiles while trying to act business-like and responsible. "Why, thank you."
She got up and put her robe back on, but she kept it open in front for the moment so he could see that she wore nothing but panties and high heels underneath. He could still see all of her glorious round tits.
Seeing that he was admiring her body, she struck a sexy pose, putting one leg on his bed. "Let's hurry up and eat breakfast, so we'll have time to play some more before you go to school. I think you know what I mean by 'play.'" She licked her lips seductively, her tongue making a complete circle around her mouth.
Finally, she closed her robe all the way and went out his door, looking both ways down the hall to make sure Katherine wasn't still there to catch her.
Once she was alone in her room, she thought, I'm bad. So bad! There was no excuse for that, none. We really have to stop this terribly improper... well... member, uh, oral manipulation? Heck, it's cocksucking. It's a nasty act with a nasty name. Proper ladies don't suck cocks, even if it is medically necessary. Suzanne can do that for him. Not that she's not a lady, sorry Suzanne, but she's not his mother! I have to stop before I'm completely out of control!
She sighed. Why though, does it have to be so wonderful? I can still taste his seed in my mouth and I love it so much that I just want to jump for joy! I must be a horrible person.