How to keep initial class object name?

Question

So I learned a little technique to initialize a class with an object name and when I call the object of the derived it gives me 2 Mother constructors and destructors. Anyone know how I can keep the pre object names but prevent them from calling twice if preventable? Here's the code below. I'm still trying to figure it out but help is needed.

#include <iostream>
using namespace std;

class Mother {
public:
Mother()
{
cout <<"Mother ctor"<<endl;
}
~Mother()
{
cout <<"Mother dtor"<<endl;
}
} M;

class Daughter: public Mother {
public:
Daughter()
{
cout <<"Daughter ctor"<<endl;
}
~Daughter()
{
cout <<"Daughter dtor"<<endl;
}
} m;

int main() {
m;
}

/* outputs:
Mother ctor
Mother ctor
Daughter ctor
Daughter dtor
Mother dtor
Mother dtor */

Answer 1

The first 'Mother ctor' is from the object M, the second from m. They are separate objects, so each of them calls the Mother constructor once.
Also the 'm;' in main has no effect.