After abolishing of Benami Property Transaction Act in the year 1988,you have absolute right over the property.It does not matter your husband provide money when purchase the property.During your life time you can sell,gift mortgage as you like,after your death if you left your property in your own name then your sons and daughter will succeed it,not now.So,if you are feel disturbance your peaceful living then you can file a Civil suit and a Criminal case also or defend the case against your son who has already filed.