Morning, Marsh Residence. The day after all the ordeal at the North Park Funland. It was past 7 a.m., and Shelly was still asleep in the outfit she used for her meeting, like Stan had left her. Speaking of whom, Stan, who had been requested by his mother to wake his sister up, entered the room. He looked like he had just woken up, as evidenced by the dark circles under his eyes.
He approached his sister and, as if it was usual, again grabbed both her buttocks and started pushing.
"Shelly, come on! Damn, this is getting old." The tiredness in his tone was noticeable.
Shelly took around thirty seconds to react. First, it was a simple moan. Then, as she regained her consciousness, she realized what her brother was doing and, with her anger fully awakening her, she tried to swat Stan's arms, who pulled them away in time. She turned around to face him.
"Fuck, again?! Stop grabbing my ass, you little harasser turd!" She growled.
"Then get up already!" He retaliated. "And stop yelling, alright? You owe me."
She scoffed. "Okay, what exactly in the world do I owe you?"
"You forgot already? How you got drunk, and I had to drag your ass back home and cover it up for Mom?"
She wanted to forget it, actually. Remembering it was embarrassing enough for her. And it worsened the headache she was feeling just now, a leftover of the previous day.
"I didn't get drunk, alright? It was an unfortunate incident. It could've happened with anyone."
"Yeah, sure." Stan rolled his eyes.
Now Shelly's headache was hitting really hard. She put her hand on her forehead for relief.
"Besides, remember who drove you there in the first place, and who took you for a ride. Show some fucking gratitude!"
Stan chose not to argue with that. He now felt a little guilty about his earlier attitude.
"By the way, where's Mom?" Shelly inquired.
"She went to pick up the car you left at the park."
"Oh, right." She got off the bed. "Do me a favor and get me an aspirin. My head's killing me."
"…Fine."
Stan reached the door and turned to Shelly again before leaving.
"You should take a shower now. You stink." He pointed.
"Fuck, just go get my medicine already! Ow, my head!"
While Shelly resisted the pain, Stan headed downstairs to get her aspirin. He returned twenty seconds later, with a pill in one hand and a glass of water in the other. When he re-entered her room, a familiar scene occurred in front of his eyes. Shelly was in the middle of undressing, preparing herself for the shower. Only her underwear remained.
The two siblings stared at each other for a while, without changing their expressions. This had happened so many times that, like Stan said, it was getting old. This didn't make Shelly any happier, though.
"Urgh, I give up!" She sighed, in exasperated resignation.
Later, after Shelly had taken her medicine and her shower, Stan prepared for his shower too, entering the bathroom right after his sister exited it. He was still in there when she had finished putting her clothes on. Once she was ready for her day-by-day, she left her room and heard the noise of running water ceasing.
Hmph, finally that little harasser's done, she assumed. Feeling the urge to pee, she quickly moved towards the door, but stopped herself before opening it.
She realized that Stan was probably undressed on the other side of the door, drying himself with the towel. And there was nothing in the world that she wanted to see less than her brother's own private parts.
No, wait, she pondered, he does this shit to me all the time. Walking in on me in the bathroom, groping me, saying stuff about my boobs and my ass…
Her face turned red with anger, while she remembered all of the actions that she enumerated. She had let Stan take advantage for too long. And then, she made her mind.
Okay, little brother, it's payback time.
Letting out a devilish grin, Shelly pushed the bathroom's door open, and saw exactly what she was expecting. A nude Stan stood before her, holding only the towel he was rubbing against his body. He stayed motionless for a moment, before he gradually blushed and instinctively put the towel in front of his genitalia.
"Jesus, Shelly, knock first!" He blurted.
"Ha! Like you're one to talk."
She loved rubbing that on his face. Stan was caught on surprise, ashamed of his own hypocrisy.
"Well, I saw you naked, and you saw me naked. Guess this makes us even."
"Pfft, even. Like if I'd feel any satisfaction in seeing your tiny thing."
Stan blushed even harder, feeling a mix of embarrassment and anger. It was official. Shelly was enjoying this.
"It's not tiny!" He protested. "My T.M.I. is above average!"
"Yeah, yeah."
Shelly then grabbed Stan's arm and tossed him out of the bathroom, leaving his towel behind.
"Now get out. I wanna pee." She closed the door.
"Hey, my towel!" Stan knocked, but Shelly wouldn't open it again. "Fuck!"
Stan was now naked and wet in the corridor. Covering himself with his hands, he rushed to his room. Inside the bathroom, Shelly lowered her pants and sat on the toilet. She rewound Stan's humiliation in her mind and grinned. She was really savoring this small victory.