Itt történik memória elszivárgás?

Ez miért nem működik jól:

//main.cpp

# include <iostream>

# include <stdlib.h>

typedef unsigned short ushort;

typedef unsigned int uint;

using std::cout;

using std::cin;

using std::endl;

class Counter

{

public:

Counter(); //Konstruktor

Counter(int x); //Konstruktor2

Counter(const Counter &); //Másoló konstruktor

~Counter(); //Destruktor

void increment(); //increment

const Counter& operator++ (); //prefix

const Counter operator++ (int); //postfix

void SetVal(int x); //SetVal

int GetVal()const; //GetVal

Counter Add(const Counter &rhs)const; //Add *itsVal+rhs.GetVal()

private:

ushort *itsVal; //*itsVal

};

//konst,konst2,copy konst,destr,

Counter::Counter():

itsVal(new ushort(1))

{cout <<"Konstruktor \n";}

Counter::Counter(int x):

itsVal(new ushort(x))

{cout <<"Konstruktor2 \n";}

Counter::Counter(const Counter &rhs)

{

cout <<"Copy konstruktor \n";

itsVal = new ushort;

*itsVal = rhs.GetVal();

}

Counter::~Counter()

{

cout <<"Destruktor \n";

delete itsVal;

itsVal = NULL;

}

//operator++

const Counter& Counter::operator++ ()

{

++*itsVal;

return *this;

}

const Counter Counter::operator++ (int)

{

++*itsVal;

return *this;

}

//Metódus

void Counter::SetVal(int x)

{*itsVal = x;}

int Counter::GetVal()const

{return *itsVal;}

void Counter::increment()

{++*itsVal;}

Counter Counter::Add(const Counter &rhs)const

{return Counter(*itsVal+rhs.GetVal());}

//main kezdõdik

int main()

{

Counter varOne(2),varTwo(3),varThree;

cout <<"varOne: "<< varOne.GetVal() << endl;

cout <<"varTwo: "<< varTwo.GetVal() << endl;

cout <<"varThree: "<< varThree.GetVal() << endl;

varThree = varOne.Add(varTwo);

cout <<"varOne: "<< varOne.GetVal() << endl;

cout <<"varTwo: "<< varTwo.GetVal() << endl;

cout <<"varThree: "<< varThree.GetVal() << endl;

return EXIT_SUCCESS;

}

Az összeadás után a varThree értéke miért lesz 4824 ?