(a) Payment of reasonable living expenses by a child welfare agency shall not obligate the birth parents to place the child for adoption. In the event that the birth parents choose not to place the child for adoption, the child welfare agency shall have no right to seek reimbursement from the birth parents, or from any relative of the birth parents, of moneys paid to, or on behalf of, the birth parents, except as provided in subsection (b) of this Section.
     (b) Notwithstanding subsection (a) of this Section, a child welfare agency may seek reimbursement of reasonable living expenses from a person who receives such payments only if the person who accepts payment of reasonable living expenses before the child’s birth, as described in subsection (a) of this Section, knows that the person on whose behalf they are accepting payment is not pregnant at the time of the receipt of such payments or the person receives reimbursement for reasonable living expenses simultaneously from more than one child welfare agency without the agencies’ knowledge.