@janet7, I am experiencing that concern! My girlfriend/sig. other of almost six years has MCI, the chemical indicators for ALZ and frontotemperol dementia, a family history of ALZ, and if that isn't enough, had a huge meningioma (benign tumor) removed from her head last July that no one knew was there although the signs were evident in hindsight. ALL of that has impacted her memory and she has already, to me, shifted from being a fellow adult/partner/lover to a recalcitrant 10-year-old with impulse control issues, needing parenting. She still knows who I am but...even now, I'm grieving. I am blessed that her two adult sons live nearby and we're working as a team to support her as best we can.