The 'family problem' works both ways but many emigrants don't consider it.
One woman I worked with in Oz had arrived there single, and then married another Pom and had children.
So several years in, though she wanted to return to UK, she realised (quite rightly) that as her kids were growing up as Aussies and enjoying the Aussie lifestyle, they would be unhappy in the UK.
So she was rather stuck there.