Am I The Only One Who Gets Bothered By This?

Since I've been pregnant my sister in law first was really sad because she isn't married and she's dying to be married and have her own baby.....she loves babies....
And she buys our unborn baby girl clothes all the time (which I appreciate) but sometimes she'll says things like just now she said "where my baby?" Or "how's my baby?"
I don't know if I'm overreacting but it makes me feel so uncomfortable.........
She tries giving me advice and everything and she's only a year older than I am....
And I have the almost for sure feeling that she's gonna try being the "mom" to our first baby....
And making me feel left out....
Guys..
What do I do?...
I'm so afraid of when our baby girl is born..
I want to be my baby's mom.. and learn on my own with my husband...
I don't need someone there hovering over me..
And Ps.
I'm living at husband house due to no affordable home here in Boston...and she still lives with her mom so....I'm living with her....
I really need to get out of this house 😞