change of status

My mother got her green card on 2001 and then applied for her 25 years old unmarried son over sea. On 2005 he got aproval from NVC .My mother became US citizen on APR 2007 and sent copy of citizenship to NVC and the status changed to( F1 ) but her son got married last year before his mother become US citizen. What does my mother need to send to national visa center besides official translated marrid sertificat and birth sertificate of both her son and his wife to chenge the status to( F3). Do they need to send any pasport pictures or somthing else.
Thanks for your help.