Moaning loudly, Julia kept pumping Mike’s twitching boner while finger-fucking herself, until their climaxes abated and their broken voices diminished to low gasps of satisfaction. Mother and son looked each other in the eye as they enjoyed the afterglow. Mike’s hands were still caressing her face as Julia, her tits drenched in his cum and her thighs wet with her pussy juices, gazed up at her son in silent affection, a mixture of love and lust glinting in her hazel eyes.
“Thank you so much, Mom,” Mike said after a while, helping her to her feet. “That was amazing. We should do it like this all the time. It relieves me much more, clears my head and everything.”
Julia raised an eyebrow, grinning in appreciation. Her son was attempting to keep up the pretense while at the same time giving her a reason not to stop herself from enjoying fully what they were doing together. ‘He’s such a sweet boy, so considerate,’ she thought, ‘I’m really lucky to have him. And look at how much he came watching me get off!’
“Sure, honey,” Julia said, meeting her son’s eyes, sharing a moment of mutual understanding. Then, giving him a long wet smooch on the cheek, she added: “As long as it helps you, baby, Mommy will do whatever you need.”
Both mother and son had a smile on their lips as Julia, still topless, made her way upstairs, walking a bit unsteadily on her pleasure-wobbly legs but still trying to get to her room as swiftly as possible, anxious to lick Mike’s delicious cum off her tits.
That night and the following morning, Julia lustfully fingered her pussy while she masturbated Mike’s huge cock, making herself cum with him while he painted her luscious mommy-boobs with his ejaculate. Still weakly trying to hang on to a last vestige of control over the situation, Julia had decided not to take off her panties as she pleasured herself in front of her boy, but that didn’t seem to reduce Mike’s enjoyment. Judging by his groans of delight and by the amount of spunk he spurted on her tits, it was obvious that her son loved to see her frigging herself to climax while she gave him her expert handjobs.
For her part, Julia loved this new development just as much as Mike did. It was such a turn on to diddle her clit and slide her fingers into her soaked folds right there in front of her son’s awestruck eyes. The way Mike looked at her made Julia tingle all over and it thrilled her to feel his cock pulse in her stroking hands whenever a little sigh of pleasure escaped her parted lips.
What Julia loved the most though was always the moment when her son orgasmed in a torrential spray of warm thick cum, bathing her jugs in his seed and pushing her closer to her peak. As soon as Mike started ejaculating, Julia would roll her clit between her fingertips in a final whirl of feverish rubs, bringing herself off with him. She felt wickedly happy that she could now openly whimper in climax as she coaxed every last drop of semen from his throbbing pole, her nectar gushing on her pussy-diddling fingers, her ample heaving breasts plastered all over with his cum.
Sighing contentedly, Julia didn’t fail to look up to meet her son’s eyes while they came together, smiling at each other between lustful gasps.
*****
It had been just two days since she began actively giving herself pleasure during her ‘motivational sessions’ with her son, and Julia was already hooked on their new dirty little game. Hornier than ever, she felt like she would explode with pent up desire any time she was apart from Mike, constantly craving the moment they would be doing it again, the sooner the better.
She was distracted and unfocused as she listened to her accountant and her lawyer relating about her financial situation. Barely hearing their words, squirming on her chair in the aseptic office while trying to ignore the pleas for attention from her needy pussy, the busty mother nodded absentmindedly as the two elderly men blabbered on and on about numbers and investments and funds. Julia’s brain stopped paying attention completely once the notion registered that things were fine on all fronts. Unsurprisingly, her thoughts instantly turned into a host of sexual scenarios all revolving around her handsome son and his big cock.
Despite her wish to wait until Mike’s return to finger herself to climax, Julia couldn’t help but masturbate the minute she was back home. With her pencil skirt hiked up and her blouse open so that she could paw at her own huge boobs, Julia leaned against the front door as she circled her clit and slid two fingers into her wet pussy until she came, giving herself some much needed relief.
Minutes later, as she changed into more comfortable clothes, standing naked before her full-length mirror and admiring her voluptuous body, Julia bit her lips and sighed. She desperately wanted to masturbate again, but she decided not to, preferring to save her arousal for later, when her son would be home too. Putting on a tight tank top and a pair of ass-hugging shorts, the horny mother felt her pussy tingle in anticipation as she wondered what the day would bring.
The moment Mike walked through the door that afternoon, beaming with happiness and breathing hard as if he had been running all the way from school, Julia instantly knew all she needed to know.
Her heart was racing as Mike rushed to her through the hall and hugged her tight, squashing her boobs between them. She had stopped wearing bras around the house and her nipples were already hard with excitement, poking into Mike’s chest through her tank top and his NOFX T-shirt as he held her in his arms.
“Mom, I got a B+ today!”
Julia tried to contain her exhilaration as she hugged him back and kissed him on the forehead, but her heart was all aflutter, knowing what that grade meant. The massive bulge pressing against her groin told her that so did Mike.
“Oh, baby, that’s great! Was it Mr. White’s chemistry test, the one you told me about the other day?”
“Yeah, I got the highest grade in my class!” he replied, beaming with joy.
“Wow, that’s really something, sweetie, I’m so glad!” Julia complimented him. She knew how strict Mike’s chemistry teacher was. “Getting a B+ with Mr. White is really nice work, honey! I think you deserve a special reward for your efforts.”
Mike’s voice trembled and his boner flexed in his pants as he said: “You mean… We can treat this like it was an A?! After all, Mr. White never gives A’s anyway, so his B+ may count as an A, right?”
“Oh, Mike, you naughty boy!” Julia smiled, playfully rolling her eyes at the suggestion that she should reward her son with her ass instead of her boobs or a blowjob. In truth, Julia was shivering in perverse delight as she held Mike’s hand and led him upstairs to his room. Instead of offending her, his brazen suggestion that she gave him access to her juicy bubble-butt turned her on even more than she already was, so much so that she was sorely tempted to consent.
Looking at him over her shoulder as they entered his bedroom, Julia noticed how hungrily Mike was feasting his eyes on her plump round ass straining against the fabric of her shorts. She chuckled softly and swayed her hips even more with each step as she basked in the thrill of having her handsome boy ogling her sumptuous mommy-rump as if hypnotized by its fleshy bounciness.
“You know what, sweetheart,” Julia said, reaching a decision as she made Mike sit down on the edge of his bed, “even if you still need an actual A to get Mommy’s ass, I think you do deserve something special today. So,” she huskily said, taking off her tank top and falling to her knees between her son’s legs, “for this B+ you won’t have to choose between fucking my boobs or getting a blowjob. You can have both, baby.”