Looking for story

Trying to find a story I read several years ago. Mom wants son to get a haircut, son refuses. Mom makes a deal, if he can keep his hair off his collar for 30 days he can keep it. Son learns a variety of updos with his mom's help. But one evening he and his mom are seen at a drive-in by two of the really popular girls when he has his hair in a Gibson Girl style. They recuit him to help them get away from their abusive boyfriends.