A 43-year-old Illinois mother gave birth to a child she allegedly conceived with a 14-year-old boy — whom her own daughter took as a date to their junior high dance, according to authorities and reports. Robyn Polston, who had chaperoned the dance, was arrested Monday morning and charged with two counts of criminal sexual assault with a child between the ages of 13 and 17 and two counts of possession of child pornography, according to court records obtained by The Post.
