Showerd, sisters

ok to start off my parents are real power/watwr savers so my family takes showers together.

My mum and dad and me and my twin sis (im a girl).

Anyways we do everything together at school and home and she is my bffl. And we do things girlfriends and boyfriends do.

We hug and kiss eachother on the lips when we leave we hold hands and sleep in the same bed sometimes, skinny dip, you name it we do it (exept for sex and that)

But the only nastest thing we have done in feel boobs.

I really wanna actually get closer to her.

Is this normal?