Sarah was just finishing up her shift at the gym when her brother, Alex, poked his head into the storage room. "Hey sis, can you help me out?" he asked, his voice hesitant.
Sarah raised an eyebrow. "What is it, wimp?" she teased, a smirk playing at the corners of her lips.
Alex blushed, rubbing the sore muscles in his glutes. "I, uh, I pulled something during my workout and it's really killing me. Could you give me a massage?"
Sarah laughed. "Fine, but you have to get into the doggy style position," she said, a playful glint in her eye.
Alex hesitated for a moment, but eventually he nodded and got into position. Sarah approached him, her hands already warm from the massage oil she had brought with her.
She started massaging his ass, her fingers digging into the tight muscles. "So, you're really enjoying this, huh?" she teased, a smirk on her face.
Alex blushed again, but he didn't say anything.
Sarah noticed his silence and decided to push her luck. "Do you want me to go deeper?" she asked, her voice low and sultry.
Alex hesitated for a moment before nodding.
Sarah reached into her bag and pulled out a dildo. "I'll only use this if you agree to follow my every command," she said, a serious look on her face.
Alex nodded again, and Sarah slowly inserted the dildo into his ass. It was 8 inches long and 2 inches in girth, and Sarah started fucking him with it, hitting his hanging balls hard.
Alex moaned in pleasure, but Sarah told him to "man up" and take it like a champ.
She pulled out the dildo and asked him if he wanted more. He nodded eagerly, and Sarah pulled out an even bigger dildo from her bag.
The new dildo was 10 inches long and 3 inches in girth. Sarah teasingly asked if he was sure he could handle it.
He insisted that he could, and Sarah slowly inserted the dildo into his ass. She started fucking him harder and faster, making him moan louder.
Sarah told him that he was doing a good job, but he needed to "take it like a man" and not make a sound. He tried to hold back his moans, but it was difficult.
Sarah pulled out the dildo and asked him if he wanted to cum. He nodded eagerly, and Sarah ordered him to jerk off while she watched.
He started jerking off, and Sarah teasingly told him that he wasn't allowed to cum until she said so. He tried to hold back, but it was difficult.
Sarah finally gave him permission to cum, and he exploded all over the floor. Sarah playfully insulted him for making a mess, but he didn't care.
Sarah cleaned up the mess and told her brother to get dressed. She teasingly told him to come back tomorrow for another "ass-istance" session.
Alex blushed and nodded, a smile on his face. Sarah chuckled and shook her head, a fond smile on her face as she watched him leave the storage room.
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