He does need to stand up for himself and be a man about it. His parents cant force him to sign the nikah papers can they? I think he is acting abit cowardly in my opnion and he is a guy. Guys usually get their own way. I think you should speak to the other girl involved and tell her the truth. I dont understand his parents either. Why force your son into marriage and have an unhappy marriage. Dont his parents care about his feelings?