Living with Cassie

I love my sister but she's a total brat. Our parents didn't exactly spoil her rotten, they tried to discipline her and raise her like they did me, she's just... resistant. She is very strong-willed, the kind of person who if you tell her not to do something that pretty much just means she'll stop at nothing to do it, in order to spite you. I don't mean to make her sound like a total bitch, she can be sweet at times, and her heart is in the right place. She's just a brat.

While I'm older and more experienced, and thus naturally in charge of the household, Cassie does own half of the house. I always hate when families let an inheritance turn them against each other, with siblings stabbing each other in the back over every nickel and dime. That's exactly the opposite of what mom and dad would have wanted, so I was determined to be a good steward of the house and keep it up as a nice place for Cassie and me to live, and maybe sell one day to get us each started as we began our own families.

Cassie got okay grades in high school but clearly wasn't the academic type. She was always good at video games, she'd come down to the basement where my buddies would be playing Smash Brothers or Call of Duty and hold her own or even beat us except she was like 12 and a girl. Now you can imagine how teenage boys reacted to an obnoxious tween girl beating us at video games, I'm afraid we were probably a bit mean and sexist to her, but the point is she was legitimately good at video games and if guys were jerks to her about it, she'd just tell them off rather than be hurt. And, even if she's a total tomboy and doesn't wear make-up half the time, she is pretty easy on the eyes, if I may speak objectively. She has that innocent cute look... ugh, the only way to put it is she looks like everybody's sweet little sister.

I say all of this because she had this set of skills that seems useless but in our crazy modern world actually has a surprisingly lucrative application: she became a live-streaming gamer girl. To my great relief she is not what I'd call a "booby streamer", wearing low cut tops and leaning into the camera, flirting with the losers who max out their credit cards making donations and leading them on to make them think they have a chance with her, all while bumbling through 5 minutes of inept video game play on a 3-hour stream.

Instead her streams are, relatively speaking, pretty respectable and all she really does on them is play games. She plays hard games like Elden Ring and beats them without too much trouble, which either amazes or enrages guys since she's a teenage girl, but it certainly works for her stream and she gets a lot of viewers. She also plays shooters like Apex Legends in squads with other girls who are good at games, which gets her more viewers. All the while she just wears her ordinary clothes and doesn't play up sex appeal, and she doesn't flirt with the people who donate or subscribe. Actually she usually is her bratty self on stream, hollering and carrying on, bickering with anyone who disagrees with her in the chat. I guess I prefer that to her showing cleavage and calling guys who tip $500 her "Biggest D of the day" and so on.

At any rate, she's just starting out but she already makes enough money that I have to admit she's onto something. I am basically her manager because I don't want her to get exploited by some parasitic third party. I set up her streams on a technical level and moderate the chat, banning any assholes who say sexual stuff about her. She makes two or three thousand dollars a month after all of the fees and expenses of streaming plus taxes, which embarrassingly is about what I make at the bank. And unlike me, her income has the potential to go way up if things bounce her way.

But being financially secure has a way of making her even more obnoxious, as I'm learning the hard way.

I woke up on the first Saturday morning in September. Cassie and I had been living in the house all summer and she was just getting to where she was making the same money as I did through her chosen career, such as it was. Honestly I thought it was cool that she was doing well in a job like that, although I did warn her that it could all end at any moment and she might have to get a real job. She just stuck her tongue out at me and said I was being boring.

We had stayed in our childhood bedrooms and left mom and dad's master bedroom untouched, it just felt wrong for either of us to move in there. This meant I was in my little old room though. 22 years of my evolving interests were here - legos, epic fantasy novels, truck magazines, posters of supermodels on the walls. I'd thrown out some of the more childish stuff but I was keeping a lot out of nostalgia. I stumbled out of bed naked and put on some boxers so I could wander down the hall to the bathroom. Our house is in a good neighborhood and has a big indulgent master suite on the first floor, but upstairs we always shared a bathroom.

Finding the coast was clear, I closed the bathroom door and started taking my morning piss. Not even 15 seconds in the door flung open.

"Uh, I'm in here, Cassie," I said.

"Duh," she said, and came in anyway. She has a raspy voice which is a little deep for a girl, but still very feminine. She can sound tough but also sultry, depending on her mood. Usually she just sounds annoying.

I kept peeing, letting it splash on the side of the bowl where it hits the water so it was really loud and obvious. If Cassie were an ordinary girl she'd have been grossed out, but alas, she just went to the sink and washed her face.

"Streaming today at six right?" I asked. She streamed about 20 or so hours a week on a schedule, since that lead to regular viewers tuning in and being more likely to donate.

"Sure," she said, slapping water on her face as she leaned over the sink. I could only see her out of the corner of my eye as I pissed noisily.

"Anything till then?" I asked. It was my day off so I figured if I had to run her around town on screwball errands, I might as well do it on a Saturday. I should say Cassie had zero interest in driving and still didn't have her license.

"I dunno," she said, "I don't plan my every minute of my day down to the minute like you, Mike. I'm a normal person."

I finished peeing and turned to tell her something like planning one's day isn't a negative trait, but then I noticed she was just wearing her panties. Her C-cup boobs jiggled as she turned to face me. They were incredibly firm, given her age and that she was a very healthy weight and in good physical shape.

"Ugh, wear a bra!" I said.

"Why? It's my house too," she said, "They're just boobs. And you've got your dick in your hand, moron."

I looked down. I'd been so annoyed that I'd spun around to yell at her with my eight-inch piss hard-on in my hand.

I hurriedly covered up and blushed. "I'm sorry!" I said, "But you barged in on me."

"Like I've never seen a dick before," she said dismissively, "But maybe you've never seen titties before huh?"

"I've seen plenty!" I said defensively, "And I've already seen yours far more than I'd care to, remember? You're always flashing those things."

Cassie loved to flash her boobs as a joke or to make a point or for any reason at all really. Why couldn't I meet a woman like that who wasn't my sister?

She laughed. It was true though, she was not modest in the least bit around the house. She was careful to keep only tasteful (very clothed) pics of her on social media though at least.

"Can't help it that I've got perfect boobs," she said conceitedly, arching her back to stick out her chest.

I rolled my eyes. "You should stream like that, you'd get bigger D's," I said. Okay, I shouldn't bicker with her... but sometimes I get annoyed.

"That's against the TOS, idiot!" she yelled. She meant the streaming site's Terms of Service, the all-powerful document that even an irreverent streamer like herself had to obey. "Besides, aren't you always on about how you like it that I keep things chaste and I'm not a booby streamer?"

"Whatever," I said, "I was clearly just joking."

"Leave it to people who are actually funny," she said, bending over and sliding down her panties.

"Whoa whoa!" I said, unable to help seeing her shaved twat. "I'm still in here!"

"So leave if you can't handle seeing a woman naked," she said.

It was hard to think of my little sister as a woman. She acted so immature, and she was totally helpless in a lot of situations (recently she'd asked me what taxes were and if she owed them!) but her body was definitely that of a woman. I couldn't argue with her there.

"It's my bathroom too," I said, standing my ground as she stood naked in front of me. You'd think an 18-year-old woman would be embarrassed to let her brother see that she shaved her twat totally hairless, but apparently not.

Cassie's about 5'2" and I'm almost a foot taller than her, but she stood there confidently despite being naked. "Outta my way, I'm taking a shower!"

"Hey, I was taking a shower and I was here first," I said grumpily.

"You were pissing, not showering!"

I rolled my eyes at her crudeness. "Well I was pissing before... oh forget this, I'm taking my shower."

Sometimes when someone's being stubborn you just have to do what you need to do to move on with your day. I started the water and waited for it to get warm. Since Cassie was still at the sink doing her morning routine I slid down my boxers, hopped in the shower, and slid the glass door closed. It was an old door with foggy glass so she couldn't really see through, or vice versa, we just saw the vague forms of each other.

Naturally Cassie sat down on the toilet and started to pee. I suppose I had just peed in front of her but that was only because she barged in on me. I tried to calm down and grabbed the soap to lather myself up in the back of the shower out of the water. I like doing that since I can make sure every inch of me gets soaped up and clean. This conveniently spared me from getting a blast of hot water when she flushed the toilet, which of course she didn't hesitate to do even though I was in the shower.

And then I heard the door swing open and Cassie stepped into the shower.

"What the fuck, Cassie?" I said. "I'm in the shower!"

"No you're not, the shower is the water part. You're standing in the back like a weirdo."

Cassie argues in a very "technically correct" way that's positively obnoxious. But what could I really do? Physically throw my naked sister out of the shower? She had me over a barrel.

"Geeze Cassie, this is really unreasonable," I said. She was naked in the water now, spinning around to get wet. I tried not to look.

"Yeah for me! Do you have any idea how much my subscribers would pay to see what you're seein'? You're lucky, Mike!"

"You're my sister, idiot," I said, mimicking the annoying way she talked.

"So don't look then!" she said. But how could I not look with a naked, nubile 18-year-old girl in front of me? I was very heterosexual and very single.

Then she spun around, bent over, and mooned me. More than that, she flashed me everything she had.

I was looking right at my sister's butthole.