Dear Mr. Sanjay
Wife is the loanee and the husband has stood as gaurantor giving a security cheque,which got dishonoured.Section 138 attracts on the person who has issued the cheque but not the loanee.Have they not taken cheques from the wife.Whenever you post a query,you should always attach the complaint copy,so that all the experts here ould be able to give you the correct advice.Every complaint ,if we study minutely will certainly have some loophole or the other,which could save the acused.This is not a gaurantee but only a possibility.kindly come out with some more facts of the case.