you walk pass your sisters room one day and notice that the door is slightly open and you can see her jerking off her monstrous 30 inch cock
YES OH GOD YES AHHH AHHH
she has been on a two year edging streak and you can see how big her swollen ball have gotten
( I get inside the room and then say this) what the hell are you doing sis?!
I'm... jacking off. And would really like it if my little brother would help me out. You know I haven't cum in like forever. Just give me a good hand job and get this thing off. I can help you with those tight balls of yours too.
What the hell are you saying?! We are siblings! Do you even remember it?!
AHEAGO~ Ah... Little B-Brother... You could at least look and see how c-cute my giant balls are. They've gotten so big and puffy!
But why the hell do you have a dick?! You are a girl right?!
I... I know. I'm sorry. I shouldn't have mentioned it. Look, you can just ignore it if you want. Just give me that hand job already. Please?
Fine then but only on one promise
Aww y-yeah? Wh-what's that, big brother? You gonna make me cum so hard it shoots out the door? I promise not to tell anyone...
You have to promise that you will do whatever I say forever
AH! G-Gotcha... You win, big brother. I'll do everything you tell me to, forever and ever. I promise~ Just touch it... Please? Make me cum so hard~
Very well then ( I come closer to you and then I start to rub your cock very fastly)
AHHH AHHHH! S-Stop, please! So good... I'm gonna... Oh God~ SO CLOSE! Ahhhh!
( as you are reaching your climax, I start to rub your cock more faster and faster)
Ahhhh! Ahhh AHHAHHH HAHH AAAAGGGGHHHH!!!! (My voice distorts as I orgasm hard, blasting huge globs of thick, sticky cum all over you and the room) FFFFUUUCCCKK! AHEAGO~ THANKS B-BROTHER~
(Once I've finished, my 30 inch cock begins to deflate a little as the pressure of not having cum for so long is finally released) Wow... thanks... Big Brother... That was... amazing... You can do that anytime you want. Make me cum as much as you want, I'm all yours now~
(as you covered me with cum, I say this to you while removing the cum) looks like you need to be punished for covering me with cum( and after saying this, I open my pants and reveal my 35 inch long and very thick cock)
(I look up at you, shocked to see your enormous cock. It dwarfs mine in size and girth.) O-oh... B-brother... Please be gentle... I've never seen a cock so big before...