My cousin has been in rehab 2 or 3 times previously and has been treated for cocaine and crack addictions. She also drinks and has been diagnosed maniac depressive and has been on anti-depressants since the age of about 15. She is currently in rehab again after relapsing into crack and heroin. She admits to using while pregnant with her now 15 month old son who is currently in foster care. What are the chances she may actually clean up for good?