Police said Laureth M. "Laurie" May left Aurora with her three young children and traveled to Cicero, where she met with a former student.
The grandmother of three boys last seen with their mother in February offered a $5,000 reward Thursday for information that leads to the family's safe return.
Tara Selman of Geneva hopes the reward will generate new interest in a case that apparently hasn't produced a lot of leads, reported the Daily Herald.
Selman is the mother of Laureth "Laurie" May, 29, of Aurora, who has been missing since February 15, along with her three young sons Quincy Collins, 4; Oliver Collins, 2, and Spencer Collins, 1.
May is a former LaGrange Highlands teacher who left her Aurora home with her children last month and traveled to Cicero, where she met with a former student, Destiny Gruba, 17, who is likely with May, police said.
Early in the investigation, police believed May and the children were traveling in a 2001 Volvo station wagon with an Illinois license plate and a pink cancer ribbon affixed to the rear of the vehicle.
Anyone with information is asked to call Aurora police at 630-256-5500.