Jane and John were sitting on the couch in their shared apartment, discussing their lackluster love lives. "I can't believe none of my ex-girlfriends ever had full-on sex with me," John complained, taking a sip of his beer.
Jane raised an eyebrow at him. "I bet it's because you have a small dick," she said playfully.
John choked on his beer, surprised by his sister's bluntness. "Is that a bet?" he asked, wiping his mouth.
Jane shrugged. "Sure, why not. If you're so confident in your skills, then let's put it to the test."
John stood up, stripping off his shirt, pants, and boxers. Jane's eyes widened as she took in his size. "Wow, I didn't know you were hiding that under your clothes," she said, impressed.
John smirked. "And here I thought you were all talk. Are you chickening out?"
Jane stood up, determined not to back down from a challenge. She stripped off her shirt, pants, panties, and bra, surprising even herself. "Fine, let's do this," she said, sitting down on his lap in the missionary position.
John's eyes widened as he felt Jane's warmth surrounding him. "Holy shit, you're so tight," he said, grabbing her hips and starting to thrust into her.
Jane gasped, surprised by how deep it felt like he was going inside her. "Are you fucking me because you've never had sex before?" she asked, jokingly.
John chuckled. "Yes, that's exactly why," he said, thrusting faster.
Jane's breathing quickened as she felt herself getting closer to the edge. "Don't cum inside me, I could get pregnant," she warned, jokingly.
John's thrusting slowed down. "Fine, I'll pull out," he said, jokingly.
Jane wrapped her legs around his waist. "No, don't. I want you to cum inside me," she said, surprising even herself.
John's thrusting sped up again, and Jane felt herself getting closer to the edge. "I'm going to cum inside you," John warned, jokingly.
Jane moaned. "Do it. Cum inside me," she said, encouraging him.
John's thrusting became erratic as he reached his peak. Jane felt him release inside her, and she moaned in satisfaction. "I can't believe we just did that," she said, panting.
John chuckled. "Neither can I. But I'm glad we did."
Jane smiled. "Me too."
As they both laid there, sweating and panting, Jane couldn't help but think that this was the start of something new and exciting between them. And she couldn't wait to see where it would take them.
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