My question involves paternity law for the State of: Texas
We are married and are expecting in January. In December we will have been married for 3 years and she has a daughter out of wedlock. Due to disagreements on discipline in the household, and after repeated attempts to work something out, I have delayed in adopting my step-daughter. I want to adopt her. We talked again about it this summer and my wife said that emotionally cannot handle dealing with the biological father for the procedures of me adopting her daughter. So, I agreed to wait. We currently do not have a way to contact the biological father. anyway ....
My wife resents me not adopting her daughter. In the past months when angry she has said that she will give our daughter her daughter's last name instead of our married last name. Well, she has recently mentioned it again in passing and I do believe she really intends to carry this out.
Can anyone help me find the law on this? From what I can see in comments, she would have the right to put whatever last name if she was not married. I would like to see something in writing where our married last name is what will be on the birth certificate. I can only imagine the way she could put otherwise is if she denied I was the biological father, which I am 100% sure I am.
Thanks

