Node.js / v8 assignment operator overloading

My question is simple, How do you define the behavior of assignment operator in v8 / Node.js?

Assume I have a class in C++ domain that have a set method. Normally when I write this JS:

var jsInstance = new CppWrappedClass(params1);
jsInstance = new CppWrappedClass(params2);

The second call to new CppWrappedClass(...) totally replaces the contents of jsInstance with the new one. What I would want to achieve is that when the second call happens, in its C++ backend, my set method gets called. Aka I define the behavior of assignment operator.

Is this even possible?