Always have been turned on by sister
My older sister is 55. I'm 43. We're half-siblings (different dads).
I've always been turned on by her. Heard her having sex many times when I was young and it drove me wild. We've flirted in playful ways, even in current times, she's still hot. Huge breasts. She's married and religious now but still has a naughty side.
One of my biggest fantasies is to watch her be fucked by 1-2 really hung guys.