1. In whose name your matrimonial home stands? If it is in your parents name, you should take up a premisies on rent for you and shift yourself (at least on records) to that rented house.
2. Wife has the right to stay at the house where her husband is staying and for this reason, detach yourself completely from your parents to ensure that you stayed there before your departure to abroad and she should now stay at your parental house till you return.
3. Once you shift at that rented house, inform the same to her in writing.
4. After that let your father file a complaint case alleging that she has attempted to enter his house though her husband does not stay their and take a stay order from the Court restraining her in entering in to your father's house.
5. It will be even better if you can make her staying with you for few days and take that rented premises in her name making her to sign that tenancy agreement (if possible).
6. After that file a divorce suit on e ground of cruelty and leave for abroad.