A few days had passed, and Alex was torn about what to do. On one hand, posting anything about Abby's panties was an invasion of privacy, especially pictures of them splayed open with the wet crotch on display. On the other hand, he loved the thrill of the risk, and loved the attention he was getting online even more. He initially got comments he expected, other guys saying degrading things about his horny sister, but what he didn't expect were the amount of girls messaging him.
Alex wasn't introverted by any means, he had dated a few girls over the last couple years, but none were as explicit and dirty as the girls in the forum publicly wishing he was their brother, and some going as far as to send him pictures of their own dirty panties. He figured that as long as he made sure there was no way to trace the posts back to himself and Abby, he was in the clear to continue posting them.
He looked out the window as he thought about this dilemma, and noticed a strange car in the driveway. He was home alone, his parents were out for the evening, and yet there was an old pickup truck parked right out front. He went downstairs to investigate and saw his sister and a guy her age making out in the car. This must have been Abby's newest fling. As he watched the two going at it, he realized this wasn't just a makeout session, this guy was fingering his sister in broad daylight. He felt his cock harden as he watched the other guy's arm going faster and faster until he saw his sister orgasm, right there for anyone to see. "This is so dangerous, anyone could see them right now" Alex thought to himself as he felt his dick dripping precum.
Abby gave him one last kiss before opening the door to the truck. Alex ran into the kitchen just as Abby stepped out of the car, pulling down her skirt and adjusting her panties before walking back into the house. She didn't say a word as she walked in and immediately headed upstairs. Alex watched his sister run up the stairs and wondered why the date had ended that way. Any time he had personally made a girl cum he expected the same in return. It was only when he saw just how messy her hair was that he realized the guy in the truck had probably used her to cum already that day.
Muted music played from the upstairs bathroom as the sound of running water began. Alex knew what he had to do, and this was probably his only opportunity to do it. His heart raced as he quietly walked up the stairs and approached the bathroom. The siblings' shared bathroom didn't have a lock on it, as Alex's mom worried about something happening to them, so he slowly cracked the door and saw the shower curtain was closed. Perfect. He got down on the ground and crawled over to the other side of the bathroom where Abby's clothes laid in a pile.
"Clothes", in this case, was an overstatement. The pile contained a Y2K jean skirt that was barely decent, a thin gray cropped t-shirt, interestingly no bra, and the treasure he was after. He locked eyes with a dark blue thong and knew he was moments away from being caught. He shoved the tiny piece of material into his pocket and escaped as quickly as possible, retreating to his room. He felt his breath get heavier as he realized how dangerous that operation was, and wondered how he would keep this going, and how to keep himself from getting caught. The original pink panties were hidden under his pillow, but he knew he needed a better hiding spot that his snooping mom and sister wouldn't accidentally stumble upon. He found his old backpack from middle school, cleared out a smaller compartment near the front, and shoved the old dirty pink panties into it.
After putting the backpack in the very back of his closet, his attention returned to the blue thong at hand. Just like his last set, he first put these up to his face to smell them. They were MUCH stronger than the last pair. A musky but clean scent filled his nostrils and brought him back to the times he had eaten girls out in the past. He loved putting his face between girls legs, sucking on clits, and feeling their little bushes on his nose as he would hold down their legs and bring them to loud orgasms.
This pair smelled much stronger, and very different than the last set, but he attributed that to them being fresher. He slowly opened them to see Abby's grool on the crotch and was met with a shock. These panties were drenched not just with her juices, but with a man's cum. He threw the pair onto the desk, and was horrified that he had just smelled them.
Anger flooded his body as he stared at the ruined panties. How could this slut walk around town letting any guy get in her panties on the first date? Why would she let them use her pussy as a cumdump in exchange for some half-assed fingering in their truck? How many men had she let use her holes and just drop her off at home right after? Any ounce of regret in his body left as he approached the desk again. If this whore wants attention, that's exactly what she's going to get. He opened his laptop and his fingers flew across the keyboard as he wrote a caption for his next post.
"I wanted to feel bad for exposing my sister's literal dirty laundry last week, but what I found today makes me feel like she deserved it. Not only does this little whore dress like a hooker and let boys finger her publicly on the first date, she apparently lets them use her as their personal cumdump too. This blue thong, her embarrassing excuse for panties, is drenched in her juices, sweat, and the cum of a guy who probably doesn't even know her middle name."
He took a picture of the disgusting piece of fabric and submitted the post. As he took his dick out and angrily jerked off, he was flooded with comments and messages saying he needed to teach her a lesson and get her in control. A girl sent him a picture of herself laying in her bed with her hand in her frilly purple panties with a message saying she can't get enough of his posts. Alex once again came all over himself as adrenaline flooded his bloodstream.
He took a few moments to calm down before looking around and realizing he should shower now too. He hid the thong in his backpack and walked into the now-empty bathroom and stripped.
- -
A few hours later, after a shower and dinner, Alex finally calmed down and had made peace with the situation. He went back to his room to play some video games, but upon opening his laptop, he was overwhelmed by the amount of notifications from his favorite forum. His post had reached the top of the charts and people loved it. As he skimmed through messages from guys saying they would've railed her in that shower to teach her a lesson, as well as girls begging for more content to play with themselves to, Alex saw one in particular that interested him. It was a message from an account Alex followed, a well known creator on this forum.
