Is it normal to have a family member as the cause of a fetish

when I was still a kid of say
5 or 6, my aunt used to live with us
and she used to wear these short
nighties to sleep and when my parents
werent home, she would sometimes
walk around wearing just a tshirt over her underwear. even as a little kid I used to enjoy looking at her legs(it obviously
wasn't sexual since I was a child, but I liked the
sight of them) and I found that I would be happy
when she wore short skirts and disappointed
when she chose to wear long pants. She moved out
when was 12, and by that time the damage was done, ever since I started noticing girls, I've had a
strong leg fetish. My eyes would always go to their
legs first and I would wonder why other guys talk
about butt and boobs when legs are clearly the
sexiest part of a girls body. Is it normal that i was attracted to my aunt's legs(even though i didnt know it at the time) and that this is the reason why i generally like women's legs?