Her mother wanted her to marry her cousin Louis d'Orl Ã ans , Duke of OrlÃ ans but the Duke of OrlÃ ans refused . Her father died in 1729 amid negotiations regarding a marriage between the then seventeen-year-old Ã lisabeth ThÃ rÃ se and her recently widowed cousin Louis d'Orl Ã ans , Duke of OrlÃ ans . He refused outright , much to the annoyance of her mother .