My mum became noticably demented after the trauma of my step-fathers death and she has continued to deteriorate. She is looked after in a secure home, and my sister deals with her on a daily basis. I live miles away . My hats off to you for taking them in, and still enjoying their company, but make sure you know when you need a break from them,ie getting them respite care, and dont feel guilty if you cant cope any longer!