Is it normal for my sister to walk around in the house in a bra

My sister always asks me what I'm wearing to a certain function

Is it weird if my siblings walk around nude right in front of me

Is it proper for my sister to change her clothes in front of me

Why would a brother stop a sister from wearing shorts but doesn't

My sister always asks me what I'm wearing to a certain function

I'm a 17 year old sister and I have found out my 13 year old

What should I do with my sister? I always suggest to her to wear

Is it normal for my sister to walk around in the house in a bra