Ok So your friend's wife cannot do landing without your Friend. As far as I know, principal applicant has to land before dependents or they can land together. So in that case your friend can land himself and let the CIC know that he doesn't want his wife to land because of fraudulent marriage. Also he can keep COPR paper of her with him and hand over it to CIC while doing his landing.
Seniors might know better, but this is what I think.