I'm at home and my mom is being insecure

As RoB stands in the kitchen, he hears the front door close from up the hallway and it's followed by gasps of air like someone just nearly drowned.

He knows the cause of the sounds, but this seems a bit more than usual. Thus, he goes to the hallway and sees his mother, Kazumi, in a far too small running outfit (really it's just a tight small sports bra that struggles to contain her awesome tits and a pair of workout panties that hug her thick thighs and slappable ass) and a pair of running shoes. She's currently doubled over gasping for breath after her "short" run.

Despite the fact he had never viewed her as fat or overweight, she decided she wanted to get into uber shape for the summer, but she seemed to be taking it to the ****.

She pants and gasps for breath before she notices him standing there, "O-oh... H-Hey RoB... D-Don't mind me. I just need s-some water." She gasped out between pants and RoB can see she's got a sheen of sweat on her.

"You need to rest, mom. I don't know why you keep thinking you need to lose weight. You're gorgeous as is." RoB said honestly as he was getting worried she was going to injure herself at this rate.

That didn't mean what he said wasn't true though, he'd more than once masturbated to the thought of her big tits, big ass, and her wide hips and thick thighs.

Kazumi's face turned even redder at the compliment, though it was hard to tell with how flushed she already was from her brief exercise attempt. Her oversized breasts heaved with each **** breath, straining against the tight fabric of her exercise top. Sweat had soaked through much of her clothing, especially around her chest, armpits and between her thick thighs.

If she moved a certain way, RoB was sure her nipples would likely be visible.

"Y-You're sweet honey, but...*gasp*...I really need to get in shape. Your father's coming back in two weeks and I want to surprise him..." She straightened up slightly, her slight stomach sticking out a bit from how tight her top and bottoms were.

RoB kept a scowl suppressed at the mention of my father since the bastard was gone constantly and never showed his mother any real affection and clearly hadn't been fucking her from the times he passed her room for the bathroom.

Now his neglect was making her want to over exercise.

"I just...need to keep at it. Maybe I should try some sit-ups instead..." She said before muttering at the end as she wiped some sweat from her brow, her ponytail disheveled and damp with perspiration. The motherly woman's natural scent had become more prominent with her exertion, especially around her sweaty armpits and between her legs.

Not that RoB cared, she seemed to be one of those women that she could be caked in sweat and still smell good.

“Mom, I can prove it to you that you’re very sexy and can get men’s attention easily. If dad doesn’t give you attention then the problem is with him. Can I prove it to you?” He declares and then asks as he stepped up to her and looked her in the eye, seeing her seem to freeze like a deer caught in the headlights.

Kazumi's eyes widened at his words, her maternal instincts conflicting with the flattery and attention she so desperately craved. Her large chest continued to rise and fall rapidly as she caught her breath, nipples visibly hard against the damp fabric of her top. A slight tremble ran through her soft, curvy body as she saw the look in her son's eyes.

"W-What do you mean, sweetie? I...I'm just your chubby old mom..." She fidgeted nervously, her thick thighs pressing together as she shifted her weight from one foot to the other "I'm all sweaty and gross right now too..." Despite her protests, there was an unmistakable blush creeping across her cheeks that wasn't just from exercise, and her eyes wouldn't quite meet his. The scent of her arousal began to mingle with her sweaty musk.

"H-How would you prove it anyway?" She asked nervously as she looked at her feet.