Story highlights Authorities say Cheryl Treadway was held hostage by her boyfriend at knifepoint

She ordered pizza online and posted a message in the comments asking for help

(CNN) A woman who was held hostage in Florida ordered a pizza with a special request to send help -- potentially saving her life and the lives of her children.

Cheryl Treadway was held by her boyfriend at knifepoint Monday afternoon, along with her three children, authorities said.

She persuaded him to let her use a cell phone to order a pepperoni pizza online from Pizza Hut, according to authorities.

"Under the comments section, there was a message asking them to send help and call 911 as they were being held hostage," the Highlands County Sheriff's Office said in a statement.

'We've never seen that before'

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