Mother in Law Denying Grandaughter

Long story short I’m Spanish (i have tan skin , curly hair & brown eyes ) is and Hubby is Caucasian ( light skin , straight dirty blond hair & green eyes ) We had a baby shes 3 month old she’s looking more & more like me ( brown eyes , her complexion is a little lighter than me and she has medium brown hair) Anyways my mother in law thinks I cheated on my husband because our daughter didn’t came out with green eyes and light complexion. I don’t know what to do about this situation should I just get a paternity test so I can shove it in her face ? I’m tired of her rude comments.