My daughter changes in front of her brother

Thats only for landlords.
People can do what they want in their own house and on their own property.

Family nudity is more common then people think. We are always nude when we are at home. No big deal unless you make it one.

Just tell them to have sex, and you need to help them. Persuade them into it. Maybe you can teach her how to give him head.

This sounds like the recipe for a very embarrassing unplanned pregnancy.

They could change behind a curtain in the corner of the room. But they won't bother because they are both nudists.

Stop worrying. They are brother and sister. It is extremely improbable that something bad takes place.

Heres another reason I don't want the responsibility of being a parent. If you can't afford housing that is appropriate for the family you created its more a problem that you caused than just happened and oh no what should you do. If your the parent then start acting like 1 and be the boss of your children. Having them in the same room as teens is inappropriate.

According to most laws it inappropriate for a boy and girl to share a room over the age of five. Since they are older than that evidently it could be they are comfortable. But this is far from OK. If you have a basement I suggest moving your son down there.

Let them figure it out on there own

I remember when I was a camp counselor back in the day the one bitchy senior counselor had a cow and campaigned to send a girl camper home for lewd behavior because she changed at the beach ( swimsuit was underneath).She ended quitting because she was so traumatized ? Didn't get the controversy then still don't get it now.

How old are they ?
I am sure she has seen his 6 inch boner cock and he has seen her bald cunt , naked ass cheeks , ass crack , asshole and naked tits

I think it's normal if they are siblings and close in age, they have know each other since birth. If it's not weird to them, it shouldn't be weird to you. Unless there are sexual undertones to either of their actions I wouldn't worry about it.

Do they help each other get undressed and does she unzip his fly and stick her hand down his pants or stare at the protruding bulge in his underwear and say " you have a really big cock , can I see it and taste it and feel it inside my bald cunt for real ? " and she whips his cock out and go down on him while she massages his nuts ?
Then she bends over and says " hurry up and fuck my ass and bald cunt "
Does he get in her pants or up her dress and finger her bald cunt and finger her asshole and lick her cum , pee , shit off of his fingers ?
Does he suck on her tits ?
Do they take showers together ?

She knew what a cock and a set of nuts looked like at 4 or 5 years old and he knew what a cunt and clit looked like at 4 or 5 years old.
They took baths together , so I'm sure they explored each other , being very curious.
She no doubt said to her Mommy , how come Johnny has a hot dog and 2 balls hanging from it ?
He no doubt said to his Mommy , how come Susie doesn't have a pickle and no balls ?
Get over it.
This isnt the 1950's or 1960's.

Then there's the joke where Little Johnny goes to school and he says to his kindergarten school teacher , " my Mommy says that my Daddy's brains are in his cock , are my brains in my cock too ? "
The teacher replied , " not yet Little Johnny , not yet. "

That's why in our African culture.. We don't share rooms with our brothers no matter how poor we are assumed to be..In Our many wierd cultures boys always have their separate rooms away from the main house...

Kids experiment and are very curious very young.
They play show me yours and I'll show you mine and they play doctor and house and they take baths together.
But usually , its brother and sister or boy and girl cousins.
Girls say " Can I play with your pee pee and can I put it in my mouth and play with your balls " ?
Boys say " Can I lick your kitty and suck on your boobies " ?
But when he starts rubbing his prick on her clit and on her tits and he starts sticking his finger in her twat and poop chute and she starts soaping up his pecker and nuts in the bath tub , thats when it should stop.
How old are they ?

My bother and sister share a room and they change in front of each other too. It just happens when you share a room. You get close to the person so you stop caring. There is a very very low chance of something being actually wrong going on.