Criminal Bio-dad Wants Dna Test For Our Son And Possible Parental Rights

Location: Texas

We are in the process of getting a lawyer, but I wanted to get reddit's preliminary opinion since we are currently out of the country on our honeymoon.

My wife and I have been together for about 4 years, and have lived together for 2.5 years. She has a now 6 year old son that calls me his dad and I call him my son. We just got married about a month and a half ago, so I was going to start the process of formally adopting him in the next few months. I have been there for him as much as I can be, and pay for his upbringing and care. Note his bio dad is not on the birth certificate.

The kid's bio dad has not been in this kid's life since he was escorted out of the hospital for violent behavior while my wife was giving birth. He abused her both verbally and physically to the point of giving my wife PTSD.

I'm not actually sure I've got the full record below but the below is what I can find online:

2016: Obstruction of Justice

2019 Criminal Charge of Reckless Driving - Dismissed

2021: Misdemeanor Driving with Suspended Liscence, Accident Causing Harm, Harrassment

2021: Aggrevated Assault with a Deadly Weapon, Harrassment

2022 Accident Involving Injury - Degree FU

2023 Misdemeanor Possession

2023 Possession, Escape While Arrested or Confined, Criminal Trespass

He has been to jail and I'm fairly certain prison multiple times and keeps landing himself back there with drug charges and reacting violently when caught. Since he last got out he's been in a half-way house with his new girlfriend who is also recently out of jail for similar charges. The concerning aspect of all this is how the bio dad acts to my wife. Before I was in the picture he would follow her around and yell at her, and would follow her home and either wait outside of her house or come up to the window to look in and watch (which is where one of the harrasment charges is from.)

Fast forward to this week, my wife got a message from bio dad's girlfriend that they want closure with our son and that the bio dad is trying to get a court ordered DNA test. They said they want to meet with her and 'save everyone the time and money'. Not one hour later, the girlfriend shows up to where my wife works looking for her. For better or for worse we are on our honeymoon so she was not there.

I am concerned about the bio dad getting partial custody or visitation at this rate. I'm concerned this guy doesn't know how to handle himself and our kid does have a lot of violent outbursts that I don't think these two would handle well. Also, I've spent the last 4 years as this kid's dad, so having some random guy show up saying he's his real dad is probably going to confuse my son significantly. Not to mention I won't be able to formally adopt if the other parent established their rights. His bio dad made it clear very colorfully before that he intends on seeing his kid and raising him so I don't think this is going to be smooth. Even if we do win the case, with his violent history and stalking I'm concerned for my family's safety.

Is there any recourse here? Should we just ignore his girlfriend and him and continue forward with the adoption? If he does get a DNA test, what are the chances of him getting parental rights? It looks like I Texas at least those chances are pretty high.