"He had told her he wanted a divorce, and she made a statement that she was going to run over him and kill him," Undersheriff J.T. Palmer told KFOR.
Which is exactly what she then did, using his own ATV, according to investigators.
The 911 call, made by a staff member at the campground and obtained by the broadcaster, hears a panicked caller tell the dispatcher: "That little girl was screaming saying her dad was dead! Somebody ran her dad over and said he was dead out on one of our trails."
The victim's 20-year-old son Christian Cornett claimed his stepmother then tried to run him and his teenage sister over, so he punched her in the face — the results of which are clearly evident in her mugshot.
Lewis was originally charged with manslaughter, but after further investigation the charges were upgraded to second-degree murder.