Though Mona;'s anger is justified, her tactics make me sympathise with anushka somehow.
In real life, this will not work. Because the man will be more angry with his wife and move away with the other woman telling the judge that he and his girlfriend cant handle the kids and they are ready to pay a monthly allowance.
In extreme cases, the man may even murder his wife.
Sorry Mona, you are turning out to be some sort of a villain by default.