why does this bother me so much?!

I admit it... my baby looks like her father. Even more than that, she looks like her grandpa, my father-in-law. My husband comes from a good sized family. And guess what I hear from ALL of them. It's how much my daughter looks like their side. 
If a my mother-in-law was a doll that said several phrases, one of them would be: "You look just like your father"
It literally what she says every time she sees my daughter. Ok, fine! I get it... 
But why do I feel upset? Is it because I'm jealous? Am I still hormonal & emotional? What's my problem? 
Does anyone feel this way?