They have been together about a year and a half. They are expecting. I have a niece, sisters partner is not her dad. My sister had social services involved with my niece as her ex partner was abusive. This new partner has history of drug addiction and mental health issues. Hasn't had a job since before they met my sister. Now we're told they are in a rehab clinic in England and could be there for between 3-18 months (Prescription drugs). This doesn't seem likely to me especially if they have a baby on the way. What other reason could he be away for that time?