Prosecutors say the woman, India Kirkseyrecorded herself performing a sex act with the child using the Periscope app, which she subsequently uploaded to the internet.
Prosecutors say the woman, India Kirksey, from West Hill, Ohio, recorded herself performing a sex act with the child using the Periscope app, which she subsequently uploaded to the internet.
She was arrested after someone who watched the video alerted the authorities from more than 1,000 miles away in Texas.
She later confessed to the police that she performed oral sex on the boy.
The alleged incident took place in January, but social services recently had the information after receiving the call from Texas.
Ms Kirksey is, however, said to be a woman with special needs.
"We as family try to the best we can to get her therapy and talk to her, maintain her safety, but sometimes you can only do so much," a family member of Ms Kirksey who did not want to be named told 9 On Your Side news channel.
"This is not in her character. It's not something she would do," she added.
Ms Kirksey's bail amount is said to stand at $350,000 (£282,000).
The case is scheduled to go to a grand jury on later this month.