The gym's storage room was a mess of sweaty equipment and dusty weights, but it was the perfect place for a quick massage. At least, that's what the brother, a muscular and cocky personal trainer, thought as he rubbed his sore glutes.
"Hey, sis," he called out to his sister, a no-nonsense businesswoman who was sorting through some paperwork. "Can you give me a quick rubdown? My ass is killing me."
She rolled her eyes, but begrudgingly agreed. "Fine, but only if you promise to stop your mansplaining about weightlifting techniques. I've heard enough about 'proper form' for one day."
He held up his hands in mock surrender. "Deal. Now, come on, get to work. I've got a hot date tonight and I want to be at my best."
She walked over to him, her heels clicking against the concrete floor. She started kneading his ass, her fingers digging into the firm muscle. "You're such a meathead," she teased, rolling her eyes. "Stop flexing."
He chuckled, but obliged. "Okay, okay. Go deeper."
She took it as an opportunity to prove her dominance. "Oh, you want it deeper, huh? How about this?" She reached for a dildo, a 7-inch, 1.5-inch girth one, and held it up with a smirk.
He hesitated, but she ordered him to get into a doggy style position. "Come on, don't be a baby. I won't hurt you... too much."
She teased him, asking if he was sure he could handle it. He nodded, trying to maintain his macho image. She slid the dildo into her own harness and started to penetrate him slowly, enjoying the power shift.
"Oh, you like that, huh?" she taunted, hitting his hanging balls hard. He yelped and cursed, but she just laughed and told him to take it like a man.
He asked for more, surprising her, and she pushed in deeper, making him gasp. She leaned down and whispered in his ear, "You're such a good boy, taking it like this for your big sister," making him blush.
He begged for more, and she relented, pushing the dildo to its full depth, making him moan and pant. She watched him, amazed at the sight, and he turned to look at her, their eyes locked in a moment of raw vulnerability and connection.
She slowed down, savoring the moment, and he whispered, "Thank you, sis," breaking the tension and making her laugh.
They cleaned up, both a little embarrassed but also exhilarated. She playfully threatened to tell their parents if he ever mansplained again. He just grinned, still a little dazed, but already planning his next request.
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