Clarification....

when certificates given by all experts are of date earlier of marriage it is definitely a fraud. Before marriage they should not have supressed this material fact. You can file deposition of witnesses in way of affidavit-cum-declaration that this fact was not narrated by the parents of bride and this important fact was supressed and you have been cheated before marraige or at first meeting or at any stage before marriage took place and can sue them with allegations of cheating and you can claim compensation also on succeeding in the criminal case. Also file petition for divorce as well file complaint with Family Court or appropriate Court and obtain order restraining the bride for asking relief under Cr. P.C. 125 for maintennce since they have cheated you. Engage local laywer who can argue very well and convince the court otherwise a very well hanging sword of Cr.PC 125 for payment of maintenance is very good weapon in their hands also take more proper action which may stop them for filing Complaint under IPC 498. take care -

File criminal complaint for suppressing the material fact though they had knowledge of their daughter being unable to pull on married life as she was suffering from major disease of Schizoaffective and simultaneously file for nulification of marriage on the basis of the medical certificates and reports which you have or if in case such certificates cannot be tendered before the court pl get the medical check up order from court for report of bride (i.e. yr wife) of herself suffering from uncurable psychological disease and file statement of psychiastrist that marriage life cannot be go on. I cannot say how much time court may take to decide and pass an order.  But make haste contact an expert lawyer also refer many such cases in the AIR wherein number of Hon'ble Court has held for nulification of marriage and as the material fact was suppressed the boys were cheated and therefore it was held that not being liable for any permanent alimony, compensation and maintneance. Hope this will give you boost.