If her son has learning disabilities and she is his main carer and is struggling to cope I think the most useful thing you can do is encourage her to contact social services so they can help her navigate either alternative living accommodation for him or further support to enable him to stay at home. The number should come under adult services on your local authority/council website. A duty social worker will answer the phone and she'll be able to give them details
Scottish political mess. Is Devolution working?