To the bathroom

As you walk up the stairs to your bathroom, before you knock, you uncap the sharpie and write on the door of the bathroom *harry's bathroom* and then knock... ignored. Knock again. "What?!"
"It's me." And to feign anger "what the fuck are you doing in my bathroom?!" You hear the water stops. Wet steps walking towards the door. The door opens up to your sister, somehow, half an hour later, still showering, and the first thing that comes out of her mouth is "what the fuck is your problem idiot? I got somewhere to be in 4 hours and i need to get ready. Enough of your silly little pranks okay? Not the time dude" You just stand there. Paying attention to your best friend's/sister's reaction when she sees that she showered in her brother's bathroom As she turns and reads the words on the door, *harry's bathroom*, you see the cogs in her head turning. "Oh. Fuck me." Thats what i intend to do dear sister.

"Listen... fuck... i cant explain this. What the fuck am i doing in your bathroom? Showering??? Naked??? In my own brother's bathroom... yuck. Listen i promise I didn't know it was yours otherwise I wouldn't have used it" Okay so this is interesting. She's treating it as if she was naked in my own room and not like its just a regular bathroom with my name on it "Stop" i say, feigning disappointment. lol. "Im not gonna tell anyone. All im gonna need in return is for me to write something on you." This sounds suspicious so i gotta make sure it seems like a prank "and if its too far you can wash it right here"
"Hmmm. I dont trust you... that's not permanent marker, is it?"
"What? No idiot. It goes away with a swipe. Its regular sharpie" that was close "deal?"
"Fine. Deal"
"Neat"
"Okay Cass. Stick out your arm for me please."
She does as told. Still ashamed of using your bathroom without asking first.
*Harry's normalcy*
"So Cassie? What does that say?"
"That you own my sense of normalcy? Why are you asking? You can read too" Always joking this Cass. "It's normal for me and you to hold hands when we're inside my bathroom" as you step in to the bathroom with her, hold her hand and close the door behind you

While holding your hand she just says "okay? Why are you stating the obvious out loud?" You know this is gonna be good. "My bad Cass. Its normal for everything that we do together stays a secret between us. And since I own your sense of normalcy, everything I do or say from now on is completely normal to you."
"no shit sherlock" you two just stand there for what felt like ages to you. her in her white towel covering her body. and you in your pajamas. wait why are you still in your pajamas? "Cass, did you finish showering?"
"no not really. now i cant do that since its your bathroom huh"
"oh it's okay you can shower. go ahead and take that towel off."
"I'm not gonna undress in front of you" interesting. "why not?" whatever her answer is, it doesn't really matter. you just want to hear how she rationalizes this "because you're my brother dingus. doing so would be considered borderline ****"
"so you have no problem with me being in the bathroom with you wearing nothing but a towel but you have a problem with me telling you to take it off?"
"well its not really a problem since it's normal for you to say those things, but me personally? I'm not gonna undress in front of my brother. that's just weird"
"so if I do this..." you cup her breast "then its fine?"
"well duh. everything you do is normal to me"
"and if I do this..." you drop her towel, letting her body be naked in all of its glory as she stands there unmoved and not caring one bit at all. "its also fine?" you obviously knew the answer to that question but you just loved toying with her in this state.
"okay what has gotten into you today? i mean this is normal and all but I feel, I cant tell how or what it is, but I feel like you're fucking with me somehow. so they do retain some, albeit it being minuscule, form of rational thought. doesn't matter to you though since it seems harmless to you. you look at Cass, admiring her marble sculpture of a body for a second before saying "Cass? you know that it's normal to get on your knees when I'm in the bathroom with you until I tell you otherwise"
"oh yeah yeah totally. guess I forgot. sorry." saying as if she was acting in a disrespectful manner to someone in their household. little did she know that she was just getting in the perfect height to meet with your cock. you start undressing yourself while your sister just sits there. I guess that's what she does in her most idle state without any other distractions. at this point, your cock has been rock hard for what seems to be hours now. so you need to get off. you walk closer to your sister. her face at level with your 7 inch hard on.
" hey sis. what do you think?"
"about...?" she shakes her head and looking up at you inquisitively
"the hard penis that's mere inches away from your face?"
"looks nice. Bigger than my last boyfriend at least. looks like a fun time too" you didn't know what you were expecting but this type of reaction certainly wasn't in your head. not that you hate it. its welcomed. but you are a curious cat so you need to hear the rational behind this. doesn't hurt that hearing them explain their surreal situations is only half the fun.
"and what makes you say that?"
"well, it's normal. just like if someone had complimented my hair. but in your case its clearly genetics. good ones too. gave you a girthy beast" you almost came right there but you held your ground "thanks that's really sweet of you. could you hold this for me?" you rest your fat cock on her face. your balls are under her lips and the rest of your member is across her face as she looks up at you. like anyone would looking up at someone talking to them. with her warm breathing around your cock "for how long?"
"I don't know? for as long as I see fit?"
"hm"
"what is it? you're not upset that i'm using you as a cock holder are you?" you say that while meaning none of it. you don't care about her feelings anymore. even if she was upset, at this moment, you do not care. you're too busy rubbing your cock all over her face. marking your territory "no not really. it's just that if I keep being your cock holder then ill guess ill miss out on hanging out with my friends" hearing her **** herself casually like this without even realizing it works wonders for you "okay Cass. its normal for you to obey my commands. so open up your mouth nice and wide and stick your tongue out"
"ahhhhhhhhhhh iz sith ooay" [is this okay?] she says while her tongue is sticking out to the best of her ability. and in the process it hovers and cleans the underside of my cock and slightly touches my balls. "yeah that's good" I rub her face with my hard member for a good few seconds while she stays in that position. everything is normal to her. no knowledge that she's effectively my ****. i hold my penis up from her face and slap her tongue a few times. *BLAP BLAP BLAP* the sound excites you
"you don't mind do you?"
"woo wuuu " [why would i?] you feel the vibrations touch your cock and it almost sends your eyes to the back of your head. but you need to stay strong for what's to come next. you cant bust just yet. you don't actually understand what she just said but damn is it hot
*BLAP BLAP BLAP* and with the final one you just let your cockhead rest on her tongue. like its getting the red carpet rolled out for it.
suddenly you feel your cock drop away from her tongue. that almost killed your mood right then and there.
"CASS WHAT THE HELL? YOURE SUPPOSED TO BE MY COCK HOLDER!"
"i know i know and i'm sorry. but that thing is heavy. harry you have a girthy penis and i never really held it with only my tongue before." never mind your mood is back on and your cock has been its hardest in 23 years. you decide to play along with this.
"fine. you don't need to hold my cock with your tongue. how about you hold it down your throat?"
"wouldn't that be considered a blowjob? harry i'm not blowing you that's disgusting" she says as she keeps her monotone voice like she's talking about a mundane task. 0 awareness to the fact that you treated her face like a cock rag and rubbed your penis across all of it and had her hold your cock with her tongue mere seconds ago "no its not a blowjob. as my cock holder its normally one of your duties to hold my cock any way i see fit. so since your my cock is too heavy for your tongue alone. i thought maybe we could use your throat as a way to help you carry the weight of my heavy cock"

she ponders it for a moment and then says "good thinking. I never thought about it that way. ill be honest when you first said you wanted to put your penis in my throat i thought the worst and that you meant it as a blowjob. but when you said it's only to hold your penis in there it just kind of clicked. made total sense for me" you are going to fuck the shit out of your sister
"yeah well i do own your sense of normalcy for a reason"
"and thanks for that. i'm sure if it was anyone else, especially another guy, they would take advantage of it" she says while completely oblivious to the fact that she has her tongue already sticking out and her mouth wide open. ready to take your cock in her throat for god knows how long.
"yup" you give her right cheek a couple of cock slaps for good measure *blab blab blab* "wouldn't want my sister's normalcy to be owned by anyone else"
you savior the moment. first you put your cock head on the edge of your sister's tongue. slowly making it reach her lips as she cleans the underside of your cock with her tongue. as you reach her lips you slowly go in. she struggle a bit but doesn't bother to move or push you away. for her this is normal. what ever you do is normal. and its her duties as a cock holder to hold your cock as you see fit. she clearly struggles when she reaches the half way point. "Cass, c'mon. I need all of my cock held in your throat" she looks up at you. eyes slightly beginning to water. but she knows what you're saying is true and factual. your cock needs to be lodged in her throat. she grabs your hands and puts it on her head and looks up at you and nods. she pushes herself even further and she"s slightly convulsing. but you hold her head there. this is what she wanted after all. cant waste all that progress she made. as she slowly eats your penis, you feel yourself pulsing. you're going to cum soon. without thinking you say "Cass you-" fuck. even her idle throat is too good. "its normal for you to find my cum delicious and wanting to swallow it every chance you get" you weren't really thinking when you said this. you were thinking with your cock mainly. which was still lodged in your sister's throat. as soon as you said that you started to bust a huge load inside of her throat. she struggled a bit, spit flying around your cock, her cheeks puffing up and what not but she held on. she really took her cock holder role seriously and ultimately she found the perfect spot. she closed her lips tightly around the end of your cock head and just swallowed everything. you have attainted heaven.
after nutting this much and this hard you were having the time of your life with your eyes closed. you simply were in complete and utter bliss. until you've heard a loud, satisfying pop. it was your cock, leaving your sister's beautiful mouth. "BRO. that was easily the tastiest thing i have gotten inside my mouth. can i could some more later?" oh. I guess she didn't hear you say that it was normal for her to find your cum tasty.
"sure thing Cassie. now get up. you've done your cock holding duty's faithfully"
she stands up and salutes you while saying "ay ay captain!"
now that you've nutted down her throat. you start thinking to yourself, you do own her sense of normalcy, but what if she says somethings to others about this? to her it seems like a normal thing to hold her brother's cock in her throat and to swallow every bit of tasty cum, to ACTUAL normal people, it might not seem so normal. you quickly come up with a plan.
"on your knees Cass"
she just managed to take two steps from her original position and now you have her on her knees again. "do you need your cock held? again? this fast? damn bro you got stamina" you might own her sense of normalcy but you're glad it didn't effect her personality that much. sure you just came down her throat but she's still your best friend/sister. also it doesn't hurt that having her personality unaltered like this makes it way hotter but lets focus on you loving her for being your best friend/sister. "no not like that I just wanted to do something. oh and could you please look forward and not look down. its a surprise"
"oh wow. I just got your delicious cum pumped straight from the source down to my stomach and now I also get a gift? someone's being awfully nice today" is she intent on making you hard again? you're sure she i'snt but you sure are glad she's this hot both in personality and body. she definitely won a genetic lottery of some kind.
you go get your pants and get the sharpie out of your pocket. you grab her abdomen, admiring it a little, but mostly to write on it. like an artist grabbing an empty canvass that's about to be drawn on. you simply write

*Harry's*

now that she has this, does it mean that she's your property? one way to find out. "Cassie, what's that on your stomach?"
she looks down and her face doesn't change a lot "woah. since when am I your property?"
guess it means exactly that. she's yours. just like your phone, your pc or your car. just another one of your properties to do whatever you want to do with. you decided to play along with the delusion. "dude c'mon you've been mine this whole time and you never told me?" you're going to love her response. whatever it may be. "am not lying bro I literally just found it. don't ask how I never realized your name was written on my stomach this whole time and that I belong to you. I swear I didn't know" that makes no sense whatsoever but she seems genuine. like she had your phone in her room and she never realized it.
"okay fine. stand up." she stands up and you admire her body. her beautiful sculpted body with a good breast size and somewhat of a bubble butt
"come closer" she stands mere inches from you and your half erect cock. you come closer to her and hug her from the front. your cock is rubbing against her vagina which makes your cock pulse a little but you power through it. you cup one of her ass cheeks in one palm "how does this make you feel?" she clearly feels strongly about **** so you wonder how you owning her makes her feel. after all, you do love your sister and will go to great lengths to make her feel happy and comfortable
...
"hahahahahhaha what a stupid fucking question" she says while bursting out laughing. her ass cheek still in your hand
"huh?"
"hey harry check this out duuuuuuuuuuuuh" as she makes an exaggerated dumb face to mock you "i have my phone in my hand gee i wonder how i feel about that guuuuuuuuuuuuuh" shes still doing the face...
"haha funny stuff Cass. it was just a question..." you get it. shes saying that an owner shouldn't care about the feelings of his property. but thats simply not you
"relax harry i was just messing with you jeez"
you let go of her bubbly ass cheek and look her straight in the face as you cup one of her breasts. dick still hovering around and occasionally touching the skin around her pussy. not that she reacts to any of that. "listen, cum dump, you might be my property first, but you're my sister second, I love you and I want you to tell me if something bothers you or makes you uncomfortable or unhappy, okay?" you hope that your words reach your sister. sure you love her but you couldn't resist a little degrading by calling her a cum dump.
"oh. it got serious all of a sudden. well, thanks harry. that's awfully considerate of you. even though im your property and that you dont need to care for my feelings, yet you still do. that's really nice of you." she looks at you with her happy wide eyes. as if you just gave her the world and not that you just called her a cum dump or that your dick is actively rubbing against her pussy while your hand is kneading her tit.
"dont mention it. I should get going and you should go back to showering. but first, i want to test something."
"what is it?"
"can you go over there and wash away the words i wrote on your arm? the one that says *Harry's normalcy* ?
"okie dokie!" you watch as she moves two steps to the sink and runs some water on it... oh... why isnt it being washed away? you're pretty sure this isnt a permanent marker. could this be related to your powers?
"ummmmm harry it wont wash off. now what?" you get an idea. makes no sense in the real word but it might work if its related to your powers
"let me see" you grab her arm. your arm now. put it under the sink and you just smudge it with your hand. woah. its coming off. this proofs it. no further testing needed. people cant remove the marker no matter what but you can easily remove it if you wanted to. after half a minute the mark that said *Harry's normalcy* is completely gone. now for the main objective of this test.

"hey cass. what are you to me right now?"
"your property?" so far so good
"okay but before we found out you were my property, i owned your sense of normalcy, right?"
"aha" she nods
"but now i dont, right?"
"yup. now you just own all of me"
"that's besides the point cum rag. before we found out that i owned you, i used you as a cock holder and that seemed normal to you then, but now i dont own your sense of normalcy, so what do you think about that?"
"hmmm... i guess it was fine? i mean back then you owned my sense of normalcy and me holding your cock in my throat was normal. but if i wasn't your property at this moment, and you tried holding your cock in my throat again then that would be extremely weird and i would have made a big deal out of it and hated you for it."
"i see. just to be sure. if i didnt own you at this moment, and we rubbed off the mark that said that i owned your sense of normalcy, and you looked back at the time that i did own your sense of normalcy and came down your throat, then what would you think?"
"i guess it would be fun. cuz think about it, at the time you owned my sense of normalcy and of course it was only normal for me to hold your cock in my throat" sweet. not only did you find out more about your powers and how invincible they are to outside interferences, but you also made your sister tell you that she held your cock in her throat multiple times. you're truly living the life
"thanks Cass. from now on i want you to be completely normal around me and everyone else unless i say otherwise. and never mention what goes on between us or how you're my property unless its needed."
"okie dokie! do you want anything else now or should i go shower and act my normal self again?"
"yeah sure. go do that." you give her a light slap on her ass, dress up and leave the bathroom.

the world will bend to your wishes! or at least, this household, you **** obsessed freak