<human>: I met my wife in graduate school, and we have been together for 8 years, married for 5 years. For the majority of our relationship, I was under the impression that we were very happy together. About 4 years ago, she told me that she was pregnant and I was elated because I have always wanted to be a father. It was obviously not planned, but we did not really worry too much about contraceptives because having kids has always been on the mind between the two of us. I make more than enough money to sustain ourselves, and we could definitely provide for our child. When my wife gave birth to our first daughter, and I held her in my arms for the first time, I was the happiest man in the world. I gave all the love in the world to her, and I wanted to do the best to be the best father ever. 

Fast forward to about a month ago, I was told by our family physician that she might be color blind. We looked into seeking out the advice of an ophthalmologist to confirm this, and it was true. I was absolutely shocked because my family has absolutely no history of colorblindness. I asked my wife if she had any history of it, and she told me that her brother and mother both have red-green colorblindness. I am under the impression that my daughter isn't truly my daughter, and my wife refuses to let me take her to receive a blood test. She even accused me of not having any faith in her. I am a mess right now, and I do not really know what to believe anymore.

Can you give me the gist of the text in a nutshell?
<bot>: Wife has a history of colorblindness in her family, but I do not. We had a daughter with colorblindness, and I refuse to believe that she is my daughter.