Did my father become a softer parent because he was much older when I was born?

My mother is his 2nd wife and he was 42 when mom gave birth. He has 2 sons with his ex wife and I heard he used to be stricter with them, applying tough love. When I (now 21) was born, his sons were already 19 and 21 years old, they moved out and were living in college. Both already have their own kids by now.

His reminds me of how the character Rhett from Gone with the Wind treated his daughter Bonnie; spoiling her, being the chilled, relaxed parent and rarely saying no. My mother was the stricter one and he wasn't. Is it age that soften him up?

Did my father become a softer parent because he was much older when I was born?
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