(CNN) The mother of a 15-month-old girl last seen two months ago and reported missing last week in Tennessee says she knew who had her daughter, and she was afraid to report her disappearance.

Evelyn Boswell of East Tennessee was last seen in December but authorities issued an Amber Alert for her Wednesday.

Her mother, Megan Boswell, said she left her daughter with someone she trusted to keep an eye on her while she was at work.

"Well the reason I didn't report it or anything was I knew the person who had her, and I didn't want them to run away with her," Boswell told CNN affiliate WCYB on Friday. "And as soon as they thought anything was going on they just kinda vanished. So I'm just kinda worried, you know, about where they are at. What they're doing with her at this point in time."

She declined to provide any names.

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