Ask your son, if he wants you to go to the wedding banquet, then go. Let him arrange where you sit, may be not 主家席, but you should be at that table as the birth mother.
尷尬 ?All the relatives know she is the second wife and not the birth mother,有咩好尷尬?一生人一次,不要讓他有遺憾,將來亦可多見面.不要因離婚而疏遠親生仔.