This might clarify the problem with your question. If your Tinia_CanPwn class isa subclass of your Tinia_CanExtender class, as indicated by your code snippet, then there is no "parent instance". There is only one object (instance) and it is an instance of Tinia_CanPwm, that has inhereted methods from the Tinia_CanExtender class ... not from an instance of that class.

#! perl -slw
use strict;
{
    package Test1; ## This is the parent class which inherits from not
+hing

    sub new{
        my $class = shift;
        return bless { __PACKAGE__ => 'test1 attribute value' }, $clas
+s;
    }
    sub whatAmI{ __PACKAGE__ }; ## No SUPER->whatAmI to call!
                                ## No SUPER->selfRef.
    sub selfRef{ shift }
    1;
}
{
    package Test2;
    our @ISA = 'Test1'; ## A subclass which inherits from Test1.

    sub new{
        my $class = shift;
        my $self = $class->SUPER::new;
        $self->{ __PACKAGE__ } = 'test2 attribute value';
        return bless $self, $class;
    }
    sub whatAmI{ shift->SUPER::whatAmI() . '->' . __PACKAGE__; };
    sub superRef{ shift->SUPER::selfRef; }
    sub selfRef{ shift }
    1;
}
{
    package Test3;
    our @ISA = 'Test2'; ## A sub-subclass which inherits from Test2

    sub new{ 
        my $class = shift;
        my $self = $class->SUPER::new;
        $self->{ __PACKAGE__ } = 'test3 attribute data';
        return bless $self, $class;
    }
    sub whatAmI{ shift->SUPER::whatAmI() . '->' . __PACKAGE__; };
    sub selfRef{ shift }
    sub superRef{ shift->SUPER::selfRef; }
    1;
}
package main;

my $obj = Test3->new;

print 'I am a ', $obj->whatAmI, $/;

print 'My instance id is                          ', $obj, $/;
print 'My instance id in the class is             ', $obj->selfRef, $/
+;
print 'My instance id in my parent class is       ', $obj->superRef, $
+/;
print 'My instance id in my grandparents class is ', $obj->superRef->s
+uperRef, $/;

__END__
P:\test>332433
I am a Test1->Test2->Test3

My instance id is                          Test3=HASH(0x18360e0)

My instance id in the class is             Test3=HASH(0x18360e0)

My instance id in my parent class is       Test3=HASH(0x18360e0)

My instance id in my grandparents class is Test3=HASH(0x18360e0)
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What this attempts to show is that whilst there are three classes providing methods to the instance $obj, the instance handle is the same regardless of which class you are executing a method from.