Your sister deserves a golden shower

You bust right through the bathroom door and see your sister naked for the first time. The water's hot enough that the shower door is almost entirely fogged, but that's okay. You'll get a better look in a second.

"Somebody's in here, twerp," your sister spits as you walk across the bathroom. "What do you think you-- Oh!"

She yelps when you open the shower door and step inside with her, rushing to cover up her tight, toned body with her wet, soapy hands. But then her nervous eyes dart down and see your cock in your hand.

"A-are you gonna pee on me?" she shudders for a moment before a grin breaks out across her face. "Holy shit, this is your first pee of the day! Your very first golden shower, and you're giving it to me. I knew you really loved me..."

"Shut up and kneel," you growl, the pressure in your bladder too great to waste time with banter. "And open your mouth."

She obeys immediately, dropping to her knees right in front of you and looking up at your with her tongue stuck out. You take a deep breath and relax, blasting your sister right in the face with piss. She doesn't flinch. She doesn't even close her eyes, though drops of salty urine must be splashing right into them. She just stares up at you with love, adoration, and... gratitude? You're pissing directly into your sister's mouth, and she's thanking her for it with her reddening eyes.

You finish peeing, shake out the last few dribbles onto her small tits, and take a bit of a risk by wiping the last drop directly onto her tongue. The sudden contact with your cock does seem to surprise her a little, but she it's quick and pee-focused enough that she accepts it.

When it's clear that you're finished, your sister closes her mouth and gulps down the last handful of piss, then burps quietly.

"That was a lot," she grins proudly. "I can't believe you let me swallow that much of your piss!"

Your sister jumps to her feet, slipping a little on the wet shower floor, and throws her arms around your neck.

"I know I'm mean to you all the time, but you really are the best brother ever! I love you so much."

"I love you too, sis," you say, awkwardly patting her back. The Developer hadn't said anything about touching other people, so you carefully kept your hands on the part of her body that you would normally be allowed to touch if you weren't both naked. "Now, get back to your shower. I'll let you know if I wanna piss on you again later."