A huge thanks to Headitor, for editing the story & giving me pointers for better future writings.
*****
All I ever really asked for was just a normal life... but for some strange reason, I always wind up into these pervy situations. What's even worse (much to my growing shame) is... I'm actually starting to like it.
I'm Dan. I just started attending the local state University. Rather than rooming up in a dorm with somebody I don't know, I was fortunate enough (or at least so I thought) to able to get to share a place with my older sister Samantha, who's also attending school (just a couple of grades ahead of me).
Staying with Samantha was definitely great. She used to tease and mess with me a lot for fun when we both were kids, but being my big sister that was nothing out of the ordinary. She always had a weird sense of humor though. She'd do unusual things like undress or change her clothes right in front of me; she once even slapped me across the face with her panties. Whenever I questioned her free-spirited behaviour with me, she'd always just smile & say "Don't worry it's fine, I'm your sister".
My sister has grown into a stunningly attractive young woman though: average height, lovely long brown hair, sensual curves with a firm rounded ass and 40D-cup tits. Despite a spectacular body and those breasts she's not particularly shy about, she oddly doesn't really date, keeping that gorgeous body at home with her brother.
I was starting to enjoy this new college life of mine, when one day, coming back home from class things really took a twist.. Samantha was already home, sitting in the living room in her bra and panties watching TV. While this is pretty normal for her, I still came into the room and froze for just a second staring at her. I really should be used to this by now, she's my sister after all, so there's nothing to be embarrassed about right?
But today something was different... she was sitting there in cute matching lacy white bra & panties, and as usual, she greeted me with a smile and "Welcome home Danny". I decided not to say anything (rather I couldn't say anything) so dropped my phone, keys, and loose change on the table and rushed to the kitchen. I paused, trying not to think of what I just saw.
I needed to eat; I hadn't eaten much since rushing out the door to get to classes earlier today, so I reached for a couple bananas we had in the kitchen, while desperately trying to get rid of the image of Samantha I captured moments ago. I've seen her undressed lots of times so this should be nothing for me, yet I was desperately trying to make my swelling cock ignore how cute she actually looked in those white underwear, with her nipples showing through the lace.
"What are you doing in there Danny?" she called out to me. She was probably suspicious that I stayed in the kitchen for so long; she probably expected me to join her on the couch since we usually watch TV together after classes. I came back into the living room and... dammit.
There was Samantha holding my phone, going through everything I had on there. I could clearly see she had opened up my photo app, and was looking at my porn stash. "Wha-what are you doing Sammy?" I called out, as I stretched my arm out in protest for her to stop, but it was clearly too late as she shot me a wide teasing smile and chuckled.
I know I can be a bit careless at times, but I clearly wasn't thinking straight when I left my unlocked phone within Samantha's reach. She had found my gallery of girls actually peeing - I download a new set everyday.
"Soooooo THAT's the kinda thing you're into huh? I never would've guessed THAT Danny" she giggled. I had been busted, and there was really nothing I could say to save myself from huge embarrassment and teasing. "It's OK, I'm your sister" she said reassuring me. "Though it is a bit funny Dan", giggling a bit.
My face glowing red, I joined her on the couch to watch television, trying to keep my eyes on the screen and away from her. I didn't know whether to be more concerned that she found all the piss porn on my phone, or the fact that couldn't forget just how damn... cute she looked in that white bra and panties.
"Ahhhh I think... I need to go potty right now", she said loudly. I tried not to react to what she just stated, but she stood up and just walked in front of me, stopping with the transparent crotch of her panties at my eye level. "Would you like to watch?" she said with a half smile.
I felt myself going hot and cold as my face turned red. I couldn't ignore such a direct question. "Wh- Why are you asking ME that?" I blurted out, my eyes fixed on her barely covered mound.
"Because Danny... that's the kinda thing you're into right? You like watching us girls go take a pee right?... You do know my eyes are up here." My mind was still in a blur, my eyes completely fixated on her pussy a few inches from my face. She turned around and pushed her tight ass against my face, so briefly, but my cheek felt it had been burned from the contact.
"It's ok I'm your sister, there's nothing to be ashamed of Danny." she said as she turned back around to face me. She put her hand on my cheek and looked down at the tent in my pants... OH MY GOD, I hadn't even noticed, but my dick was sticking up as hard as steel.
"See," she said teasingly," you really do like the idea of watching me take a piss. If you tell me the truth I'll let you watch me every time I take a pee".
I was helpless now, desperate actually... all I could do was tell her the truth. I sighed, looked back at her panty covered pussy and confessed. "Y-Yes... I do kinda like watching girls taking a piss." I said, not breaking eye contact with her mound.
"Danny come on I know you, I can tell when there's more. Tell me everything. What else do you like? Tell me how much you really like watching us girls take a piss".
God I loved hearing her say that word. Just her voice saying "Piss" or "Potty" or "Pee" was enough to have my dick hard enough to break stone... but there was nothing left I could hide. Samantha had me. "Yes I really love it. I love it with all of my heart, watching girls take a piss. Just hearing them SAY it drives me crazy and I want to see their pee flowing from their pussies" I told her.
"What else do you like to do? Do you ever want to taste it too?" she asked.