Published: Jun 04, 2014 12:24 PM EDT
Updated: Jun 04, 2014 9:10 PM EDT

LEE COUNTY, Fla.- A Lehigh Acres woman charged in the drowning death of a 2-year-old boy is on the stand, and today she admitted to making a mistake.

An emotional Melissa Smith took the stand in her own defense.  She plead her innocence with the jury, yet admited she made the wrong decision last summer, "I made a mistake. I should have got everybody out, even just to go pee real quick."

Deputies say last summer Christian Byrd died in a kiddie pool under the watch of Melissa Smith. Smith is charged with manslaughter in Christian Byrd's death.

Smith's daughter used to substitute for her if she was not able to watch the kids.  When the state asked Smith's daughter if she ever put the kids in the pool, her reponse was no saying, "It was too much work."

"I don't know how that happened," says Smith.  "I have no idea why he couldn't have stood up in that pool."

The trial is mostly centered around that pool, and the state argues it wasn't to code and needed a fence.  Smith says she was told first hand it didn't.

Smith was also watching 7 children that day, one more than state law allows. When asked if only watching six kids would have saved Christian's life, Smith said, "I don't think it would have made a difference. Nothing ever happened."

The trial is expected to wrap up Thursday.