1. Yes these are instances of gravest kind of cruelty.
2. Hence you can file on this basis a suit for dissolution of marriage.
3. However do remember that contested divorce suit takes lots of time and hence it's advisable that you try for mutual divorce by amicable settlement.
4. Since your father has already breathed his last and if there is chance of reform in your wife then for the sake of the children you may give one final try to this marriage.