My 85 yr. old mother has been living with my husband and me for about 6 months. Things have been going well, but some days she seems to go off on these tangents of telling stories about the past, all of which are negative. The past that I remember was full of happy times. She remembers little things like some ugly thing a neighbor said about our dog or some other non important thing. I am a very positive person and I try to remind her of the good times we had over the years, but it gets very draining when she gets in one of her negative attitudes.