10/18/2011 10:34 am ET Updated Dec 18, 2011

Na Choi, Northbrook Woman, Charged With Sexually Assaulting Boy From Her Church Youth Group

A 24-year-old Northbrook woman was arrested and charged Saturday evening after police allegedly discovered her naked with a 15-year-old boy in a suspiciously parked car in a city parking lot.

Na Choi, of the 2000 block of Valencia Drive, was charged with criminal sexual assault in the incident, which occurred about 8 p.m. Saturday in Wood Oaks Green Park, TribLocal reports. According to police, the two people admitted they had engaged in sexual contact in the car.

According to the Chicago Sun-Times, Choi was a volunteer at Prospect Heights' Agape Presbyterian Church, leading a youth group of which the teenage boy was a member.

Choi's bail was set at $15,000 and her next court date has been scheduled for Oct. 26.

If convicted of the assault, she will face a sentence of up to 15 years in prison.