I had an experience somewhat like this, but going the other way…
My father, who was 40 when I was born in 1960, grew up listening to orchestral and big-band sounds, like most of the WW2 generation. By the time I was a young teenager and heavily into 60s and 70s rock, his tastes were basically elevator music, “Muzak” for those who recall. Mantovani was big for him. He disdained and disparaged rock music in a big way.
In 1975, when I was fifteen, he had the first of two heart attacks, the second a couple years later. By the late 70s he’d undergone something of a mid-life change, his perspective really evolved on lots of things. He greatly broadened his tastes in food and drink, movies, travel, etc. I was able to get him to start listening to real music, starting with the kind of acoustic-based rock I still love to this day. Little Feat’s Waiting for Columbus was one that really had a huge effect on his musical worldview-- he loved Dixie Chicken and Old Folks Boogie in particular.
Music became one of the many ways our relationship grew stronger and stronger over the years. After I left home for college, I would always bring him a couple of CDs every time I came home to visit (a few times a year), and for his birthday and Xmas. We would sit and listen and spend great quality time together. He got into the habit of going to music stores and browsing the shelves, and talking to the staff about whatever they had playing in the store if it appealed to him. I count it as one of the great achievements of my life to have gotten him to embrace good music.
And finally the punchline: One time when I came home for a visit, he reached for a CD that he had just bought after hearing it in a store, and excitedly put it on. “Dave, you’ll love this-- have you ever heard of a guy named Eric Clapton??” (It was his Unplugged record). “Why, yes Dad, I sure have…” Completely awesome!