A cashier for a convenience store sold herself a lottery ticket and won $1 million in Doniphan, Missouri.

Mary Jane Hart, a mother of three with two steady jobs, selected NASCAR driver numbers to chance herself at the $590 million Powerball in a Harlan Pit Stop store.

"I've always wanted to win a jackpot so that I could go to way more Nascar races than I go to, which is a lot," Hart says.

After a 30 minute phone call with her daughter Nicki to convince her that she was not joking, the clerk drove to the Missouri state lottery office in St. Louis to claim her prize Monday morning.

One week before, she had won another $500 on Pick 4. She chose Quick Pick numbers instead of the normal driver numbers that time.

"We're just a little common people here in a very poor community so this has been a very big deal to everybody here," Hart described her hometown of 2000 people.

Hart will use her fortune of $710,000 (the amount she will receive after taxes) to help her son David who was disabled due to a severe car accident and to visit Hawaii, but will continue to work as a store clerk and a pharmacy technician.

"Last week his Jeep wouldn't run so I had to take him to get groceries and run errands. I told him I plan on buying him a vehicle that will start every morning.

"He started crying," she said.