My First Memory that I Remember

The first memory I have is watching my dad feed Julie with a bottle. He had dark hair and longer sideburns. She was small enough to still be held in the crook of his arm. He had the bottle tucked under his chin and was smiling and cooing at her. I remember having a warm, peaceful feeling. Julie is about 2 years younger than me so that would put this memory when I was about 3 years old.