Saturn is… Hera, I think?

Zeus’ wife, whom he constantly cheats on.

Zeus = Jupiter Hera = Saturn

… I can’t think of a Hera story off the top of my head.

I… think Athena erupted out of Zeus’ forehead… for some reason, and that’s how she was born…

Uh… ok I am apparently kind of wrong?

Saturn is … apparently the Roman name for Kronos… and Juno is the Roman name for Hera… but at some point in history, Saturn started to be used to refer to… Hera, sometimes, by some people?

Somebody summon a classics major, I’m out of my element.

Anyway, this is probably the painting you are thinking of:

https://wikipedia.org/wiki/Saturn_Devouring_His_Son

In this painting, Saturn = Kronos.