Kelly Matsunaga, a single mom and fitness icon who teaches barre and Pilates classes to hundreds of thousands of women online, wasn't supposed to be a businesswoman. She wasn't supposed to work at all.

Matsunaga, 34, was always taught and told to be just two things: A wife and a mother.

Matsunaga, who was raised in a Mormon family but has since left the church, recalls plotting out her future with her parents when she was growing up in Jacksonville, Florida.

"We had sit-down conversations with my parents where they would talk about how it was my job to be a wife and to stay home with the kids," she said.

She got married at 20 years old and got pregnant right away. But the marriage was rocky. She said her husband was emotionally abusive. After nine years and three children, she left him.