With respect to adoption placement of children who have been identified or located by prospective adoptive parents, payment for the living expenses of the birth mother by the prospective adoptive parents shall be permitted in an amount not to exceed one thousand five hundred dollars or such amount as may be approved in unusual circumstances by the probate court for the district where the child-placing agency is located or where the prospective adoptive parents reside. In addition to the payment of living expenses, payment by the prospective adoptive parents of reasonable telephone and maternity clothing expenses of the birth mother shall be permitted.