Nothing in this section and sections 45a-724, 45a-727, 45a-727a and 45a-731 shall be construed to establish or constitute an endorsement of any public policy with respect to marriage, civil union or any other form of relation between unmarried persons or with respect to any rights of or between such persons other than their rights and responsibilities to a child who is a subject of an adoption as provided for in sections 45a-724 and 45a-727.