yes until she got raped then cursed
No.
no Medusa was never married.
There is no myth about Isis and Medusa.
Not in myth.
Yes, Medusa was cursed from the goddess called Athena. Athena got jealous from medusa's beauty because everyone wanted Medusa. Athena decided to curse Medusa. Now Medusa is a monster and has snakes for hair, Medusa got cursed so badly that Athena made the curse that if anyone looks at medusa will turn to stone. This teaches every god not to ever look at Medusa's face and or never to get interested in her.
no medusa was never married she was a loaner thbe whole of her life.
yes
theoretically Medusa was was never seen but a lot of the Greek people say that they have seen her.
Medusa was not a criminal. She was a monster. The only people she ever associated with were her sisters, Stheno and Euryale.
She was once the most beautiful goddess of them all. But then when Aphrodite was born, she got jealous of Medusa. So she put a spell on Medusa so that she could become the most hideous goddess ever. And that is what happen to Medusa!!
Most likely, since Medusa and her sisters, the Gorgons, turned any one who came there way into stone.
Since Medusa is a mythological figure, no age is ever given. However, she was mortal, so she was no older than any normal person could be.