I think your first port of call would be to contact your neighbours son & daughter,explain what's been going on and ask if they can go with her to the dr's the dr will do a memory test on her,then take it from there,my hubby has alzhiemers and vascular dementia,after memory test from the dr another in depth memory test was booked which was done at-home, and then a brain scan was booked,before eventual diagnosis.it sounds like this lady needs help and fast,
advice please DGS requires speech therapy


