This was the heartwarming moment a Houston woman surprised the man who raised for 30 years with adoption papers on Father's Day (June 21).

Rudy Hernandez had been Cristabel Mireles father figure since she was five and is now planning to change her last name to his.

Alvaro Rodriguez, Cristabel's partner, who filmed this moment told Newsflare: "He's a really tough old school guy, I was expecting a joke or some sarcastic comment to be honest."

My stepdad has raised me since I was 5. I'm 30 now with 3 kids. This Father's Day, I surprised him with adoption papers and will be changing my last name to his.

Rudy Hernandez (the dad) & Cristabel Mireles (soon to be Hernandez).

Honestly no. He's a really tough old school guy. I was expecting a joke or some sarcastic comment tbh.