1. Apprehensively you have been swindeled by your Cousin and now you face threat of his Suicide, for which could fall into gross legal trouble.
2. You have legal option of filing Police FIR and a Civil Suit for Recovery of your amount based on the available documentary evidences you hold.
3. Next time NEVER EVER lend money even to your own Wife or ANYBODY and if you are forced to lend then forget such money.
Keep Smiling .... Hemant Agarwal