Is it normal to be sexually aroused looking at your sister's ass?

Wtf...

All young chiquita's { pre teens ages 5 - 11 } get hot and turned on by seeing their brothers or their Dad's or relatives cocks and balls.
They stare at them when they take baths or showers together or see their cocks getting undressed or see them walking around naked or if they catch them jacking off.
They think they are very interesting and they are very curious as to what they would feel like inside their bald cunts , in their booty holes and in their mouths.
When they see them naked , they ask the male if she can touch it and play with it and play with his balls and put his pee pee in their mouths.
Then she will put his 6 inch boner cock in her hand and rub it on her pink enlarged clit and she will rub it in between her ass crack and put it in between her tits and squeeze her tits together and he slides his cock in between her tits and give her a titie job until he pops a nut and squirts it all over her tits and on her neck and she will take her fingers and wipe his cum up with her fingers and spread it on her cunt and stick her cum soaked fingers inside her twat and then she will lick his and her cum off of her fingers.

It is disgusting
But I'm sure you understand your feelings better

Sure.