Adding a spouse name in property

the property is in the name of my father. due to outside influence, he is saying that he will give the property in charity after my marriage. Being a daughter, i am concerned about the situation and want to include my mother's name in the property so that he may not take any wrong decision out of any outside influence. please guide me how can i proceed so that if he takes any decision he needs his wife's approval as well. thats all i want. it has to be joint decision whenever and whatever it is. please help... need guidance