UPDATED 12/30/10 9:46 a.m.

WHEATON, Ill. (CBS) — A mother of three who sought some “personal time” last month in her van outside a Naperville motel has been convicted of keeping a loaded, unregistered handgun in the vehicle.

DuPage County Circuit Court Judge George J. Sotos placed the woman, Vicki K. Myers, on 11 weeks of court supervision and fined her $285, after finding her guilty of a charge of keeping a firearm in a vehicle.

Myers, 44, formerly lived in Texas and is reportedly homeless. She pleaded guilty Dec. 22 in the Wheaton Field Court and is on supervision until March 9, according to court records.

Naperville police arrested Myers on Nov. 12, after a patrol officer found her topless in her van outside the Red Roof Inn, located on the 1600 block of Diehl Road in the western suburb.

“She originally told officers she was changing,” Naperville police Sgt. Gregg Bell said last month, but she later changed her story to say she left the motel and went into the van to masturbate.

All three children were old enough to be left alone without constant adult supervision, police said.

Police found several sex toys in the van, along with a loaded, semiautomatic pistol beneath the driver’s seat.

Myers was charged with having the weapon without a valid firearms owner’s identification card.

Myers said she believed it was legal to have the gun in the van, as it had been in Texas, where she lived several years ago. But this is not the case in Illinois without an FOID card.

The Sun-Times Media Wire contributed to this report.