My real dad wants to walk me down the aisle, but my stepdad raised me

Hi everyone, first time posting here so sorry if my post is not the best. I am getting married in 7 months and I am so happy but also I cant sleep because of this one thing. My dad left when I was 8. He didnt call much, missed my birthdays, my graduation, everything. My mum then met my stepdad when I was 10 and he basically raised me. He drove me to school, he cried when I passed my driving test, he is the one who came to me when I had my worst breakup. I always said in my head that he would walk me down the aisle, and he doesnt even know I thought this, we never talked about it. Two weeks ago my real dad message me out of nowhere. He heard about the engagement from my aunt. He said “I know I dont deserve it but it would mean the world to walk my daughter down.” He was crying on the phone. Now my mum says I should let him because “he is still your father and you will regret it later”. My fiancé says its my choice but I can see he is not sure what to say. My stepdad hasnt said anything, but I think he knows, and he is acting quiet lately, and it breaks my heart. I dont want to hurt anyone on the biggest day of my life. But somebody will get hurt whatever I choose. What would you do?