1. I do not think in such volatile condition anyone is expected to lead a normal marital life.
2. Hence it would be prudent for you to proceed to dissolve the marriage preferably on mutual consent and if not then by way of filing contested suit for divorce.
3. in the contested suit fir divorce you have to take the plea of of cruelty and highlight the perpetration done by her on you and your parents over the years. Her mental illness can also be pleaded.
4. You can not avoid initiation of 498A case which is mostly the natural corollary or retribution out of a divorce suit.
5. However you need not worry much about 498A cases as now police can not make over night arrests and you are expected to get ample opportunity to apply for bail.
6. once you get the bail which should be the routine affair , you can contest the case on merit. The 498A case hardly succeeds.
Best of luck.