A Montgomery County Public Schools spokesman said yesterday that the district will not bar parents from sitting in on a sex-ed course that begins this week, and that they never intended to. "Parents of kids in those classes will be allowed [in]," said spokesman Brian Edwards, contradicting statements he made days before to The Washington Times. In a phone interview Friday, Mr. Edwards, who has been with the school district since November, said "no" when asked whether parents would be allowed to audit the sex-ed classes.