She took ballet lessons in high school. After that, she entered the Thorpton School of Dance. Thalia helped pay her way through school by taking any dance job she could find. Some of them were in theater. She soon found out, however, that being a stripper paid the best and was often more fun.
Then along came her first marriage, which interrupted all of that. No more school. No more dance career. Thalia became a more-or-less 'traditional' housewife and decided she liked the lifestyle. A lot.
She still danced after that, but almost always while alone, usually in the basement or garage.