Wife threatening to torture our child asking me to transfer property?

My wife was repeatedly threatening an acid attack on our six-year-old child last month if I did not listen to my wife’s unjust demands. She physically and mentally tortures the child repeatedly and has also tortured me quite often in the past. She has become very violent and regularly prevents me from going to work. She has also threatened to break my legs and cripple me. She demands that I write my share in parental property in her name. But there are times when she takes very good care of me. All this is very confusing. What should I do?