If my son was younger(1-3) and a fatherly figure came in his life and I married the man. If my son called him daddy and his real father was okay with it, I wouldn't force a change. Knowing my sons father he wouldn't be okay with it, so it would've been Mr. ??? I only see it this way because I was in this situation. My mom and step dad were married for over 10 years.
My step dad remarried and his new wife, we call Ms. ???
My son is 8. If my new man came in being super step dad, my son will call him Mr. ????
My family is not like many others.