Is it normal that i call my little sister "baby"?

I only call your sister Baby when she is sucking my cock!

Freud would have had a ball dissecting this. I'd bet he would say you underneath it all want to bone all your sister's bodily orifices.

has there been any incest?

My little sister is 5 and I call her baby.

I call my lady dog mommy or mama.

I call mu little sister babe, so I personnally think it's normal.

Why not. It's normal for parents and since you are that much older then her you're in a similar position.

How old is your sister and does she mind you calling her that?

Why wouldn't that be normal?

Some people call their lovers those names, but it's not completely uncommon to hear them from family members either. Though, they are said in completely different ways I think.