Overbearing? Or am I too sensitive?

My daughter is 8 months now and our family has so much love to give her. However, I know this may be petty but I get annoyed when anyone refers to my daughter as their “baby.” Especially my sister in law has even gotten to the point to say she is her mom, and refers to my daughter as hers. “Thank you for bringing my daughter,” hows my daughter doing” are often comments I hear as I clench my teeth. I feel like I am the one who works so hard to take care of her, she came out of me, and it is odd for her to constantly refer to my daughter as hers. She is my daughter, her brother and I conceived her. Mind you, this girl is younger than myself, no kids of her own, and really loves my daughter. But It really bothers me no matter how much I try to dismiss it. Am I being petty for not liking that she calls my daughter hers? Even my husbands mother sometimes asks “how is my daughter!” It’s her granddaughter! Why do

I get so annoyed by this? Anyone feel the same. Also, I know that my in laws dismiss anything we say, for example, please no kissing baby on mouth, please no makeup or allowing baby to touch your face with makeup on (she puts her hands in her mouth don’t want her to get sick) perhaps I have some trust issues embedded in, it’s okay to love her, but can’t they respect that I am her mother and she should only refer to me as mom?