I plan to marry this year. My partner owes over $100,000 in child support. I own my own unit. He has nothing. I want to leave the unit to my only son. How can I do this legally? I know I have to change my will when I marry. My partner has not contributed towards the Unit. He pays half rates, body corporate, electricity, etc. Should I make my son Tenants in Common to ensure he inherits the Unit? Your help is appreciated.