Not many you can say that about, but Theron really has gotten better... and she started out already waaaaay up there. My wife's a big fan (partly because she lived in S. Africa throughout her teens and thinks everything SA is special).
We were watching something Theron was in a couple of years ago and my wife said, "She could make me think about switching teams." I don't remember anything about the rest of the movie after that.
You should have told it's never to late to phone a friend and try something new.......
Some other women I think have gotten hotter with age (of course they all have hit, or will hit a wall at some point).... off the top of my head...
Robin Wright - oh momma. Mid/late 50s and is hotter than she was 20 years ago.
Jennifer Beals - 60 or near 60, and still sizzles. Same with Julianne Moore.
JLo - dat azz at 50+
Halle Berry and Sandra Bullock- mid 50s, fit as F and still dimes
Jennifer Connelly and Lucy Liu - 50ish and neither looks no more than 35
Renee Zellweger - always cute as hell, but saw her in that Netflix series and was amazed at how classically pretty she has gotten.
Gillian Anderson - didn't think she was hot in X-files, but she's smoking now at 50ish
Grace Park - almost 50, still looks like 25-30
Holly Hunter - 60s and still fit as a fiddle. The face is starting to wear, but she looked great well into her 50s.